OPINION

Attorney Barbara R. Hudson, counsel for plaintiffs in Belton v. Sigmon, No. 97- *154 CV-53 (W.D.Va. Jan. 22,1999), appeals the district court’s order imposing sanctions against her pursuant to Fed.R.Civ.P. 11. For the following reasons, we affirm.

I.

Plaintiffs, Beverly Lynn Belton, R.N., Brenda Wade Neely, R.N., Shirley Baum-gardener, R.N., Debra Hall, and Kathryn Rebecca Poole, filed a complaint against defendants, S & S Healthcare, Inc. (S & S Healthcare) and its co-owners, Leland J. Sigmon and Thomas H. Summers, alleging that defendants violated the Fair Labor Standards Act, 29 U.S.C.A. § 201 (the Act), by engaging in fraudulent practices. Plaintiffs alleged that defendants unlawfully required plaintiffs to work uncompensated overtime hours and that they were entitled to compensatory, liquidated, and punitive damages, as well as, an injunction, costs, attorneys’ fees, interest, and a declaration that defendants’ employment contract was void as against public policy. Plaintiffs alleged that defendants hired each of them as salaried employees, but that each worked overtime hours on a daily basis, and on weekends, without compensation. Plaintiffs’ complaint also contained an allegation that defendants retaliated against plaintiffs for filing this action under the Act.

During discovery, certain plaintiffs attached to their interrogatory answers lists indicating their “documented overtime hours worked” and “average undocumented hours worked.” 1 While deposing some plaintiffs, the defendants learned that several plaintiffs did not actually work at S & S Healthcare on their scheduled work days, yet these plaintiffs received pay from S & S Healthcare for those days. Also, defendants discovered that Miss Belton and Miss Neely claimed overtime hours to be paid by the defendants on days they worked at Danville Regional Medical Center (Danville Regional), an unrelated health care facility. Defendants moved for summary judgment claiming that plaintiffs were exempt employees under the Act and thus, they were not entitled to overtime pay under the Act. Defendants attached plaintiffs’ self-generated overtime lists to their summary judgment motion and memorandum in support thereof. In a letter, defendants requested that Miss Hudson, as counsel to plaintiffs, withdraw the claims and terminate the litigation because defendants believed that the inaccurate overtime lists rendered plaintiffs’ claims unwarranted.

Instead of withdrawing these claims, or correcting any inaccuracies regarding plaintiffs’ overtime hours, Miss Hudson filed a memorandum in opposition to defendants’ motion for summary judgment and continued to pursue plaintiffs’ claims that defendants owed them compensation for overtime hours despite the inaccuracies. On November 17, 1998, the district court granted summary judgment to defendants finding that although defendants had made some improper pay deductions in violation of the Act, defendants could avail themselves to the “window of corrections” because the improper pay deductions were made for reasons other than lack of work. It also held that the nurse plaintiffs were exempt as in a bona fide executive capacity, and the others were in a bona fide administrative capacity. At that time, the district court did not address defendants’ allegations that plain *155 tiffs’ claimed overtime hours were fraudulently recorded.

On November 2, 1998, defendants had filed a motion for Rule 11 sanctions alleging that “plaintiffs’ allegations and factual contentions do not have evidentiary support and that fact was brought to the attention of plaintiffs in the defendants’ summary judgment memorandum and exhibits in support.” Defendants argued that Rule 11 sanctions were appropriate because plaintiffs continued to pursue the overtime hours claim in subsequently filed documents despite inaccuracies in the supporting evidence. On January 22, 1999, after a hearing, the district court entered its opinion and order in writing in which it made factual findings concerning the days on which plaintiffs Belton and Neely made claims for documented overtime hours and on which they were also employed at Dan-ville Regional. Consequently, the district court imposed sanctions on Miss Hudson for failing to withdraw the claims for these overtime hours. 2 Miss Hudson appeals the district court’s order.

We review the award of sanctions under Rule 11 for abuse of discretion. Chaudhry v. Gallerizzo, 174 F.3d 394, 410 (4th Cir. 1999).

II.

Miss Hudson asserts that the sanctioned conduct was actually a discovery abuse and therefore sanctions under Rule 37 should have been considered, rather than sanctions under Rule 11. Federal Civil Procedure Rule 11(b) states in pertinent part:

[b]y presenting to the court (whether by signing, filing, submitting, or later advocating) a pleading, written motion, or other paper, an attorney or unrepresented party is certifying to the best of the person’s knowledge, information, and belief, formed after an inquiry reasonable under the circumstances,—

(1) it is not being presented for any improper purpose, such as to harass or to cause unnecessary delay or needless increase in the cost of litigation;

(2) the claims, defenses, and other legal contentions therein are warranted by existing law or by a nonfrivolous argument for the extension, modification, or reversal of existing law or the establishment of new law;

(3) the allegations and other factual contentions have evidentiary support of, if specifically so identified, are likely to have evidentiary support after a reasonable opportunity for further investigation or discovery....

Fed.R.Civ.P. 11(b) (emphasis added). Rule 11(d) goes on to state that subdivisions (a) through (c) of Rule 11 do not apply to “disclosures and discovery requests, responses, objections, and motions that are subject to the provisions of Rules 26 through 37.” Fed.R.Civ.P. 11(d).

The district court awarded Rule 11 sanctions because Miss Hudson failed to reduce the number of claimed overtime hours or demonstrate that plaintiffs accounted for those hours in their initial estimate. 3 Miss Hudson continued to argue in her opposition to the defendants’ motion for summary judgment that plaintiffs’ claimed overtime hours were only an estimate; however, the district court specifically pointed out that hours worked at Danville Regional were recorded as hours *156 worked at S & S Healthcare and that these hours were not general estimates as Miss Hudson continued to assert. Even at oral argument before the district court Miss Hudson refused to acknowledge that the claimed overtime was inaccurate.

MISS HUDSON: Well, again, when they did their estimates of overtime, they did not have their personal records, they don’t have their time records, they don’t have all this documentation....

COURT: Well, she was confronted by this information and did not correct it. MISS HUDSON: There was nothing to correct, Your Honor.

We find that the district court’s imposition of Rule 11 sanctions was justified by Miss Hudson’s failure to withdraw or correct the claims for compensation for overtime. Plaintiffs’ opposition to defendants’ motion for summary judgment constituted a written motion or other paper under Rule 11(b). The claims relating to the overtime hours in this motion were not warranted by law, and the factual contentions therein could not have been shown as correct by Miss Hudson given the development of the surrounding facts in plaintiffs’ interrogatories and deposition testimony. See Fed. R.Civ.P. 11(b). The sanctions imposed by the district court were a direct result of plaintiffs’ opposition to defendants’ summary judgment motion, not a result, as Miss Hudson argues, of discovery abuses.

Miss Hudson also contends that she was denied due process because the district court imposed Rule 11 sanctions upon a different ground than was stated in defendants’ motion for Rule 11 sanctions. The district court awarded Rule 11 sanctions based on a ground clearly mentioned in defendants’ memorandum in support of their motion for Rule 11 sanctions; “by signing and filing the plaintiffs’ response to the defendants’ motion for summary judgment, plaintiffs’ counsel continued to pursue the overtime claims not warranted by existing law and not supported by the evidence----” So Miss Hudson’s assertion is without merit.

III.

In her brief to this court, Miss Hudson asserts that the district court abused its discretion in denying plaintiffs’ motion for an enlargement of time to respond to defendants’ motion for summary judgment. The pursuit of this claim was not consistent with the parties’ settlement agreement in Belton v. Sigmon. 4 After the parties reached their settlement agreement, this court entered an order dismissing all matters properly appealed except for the Rule 11 sanctions issue. Belton v. Sigmon, No. 98-2821 (4th Cir. Mar.8, 1999). For this reason, we decline to address the enlargement of time issue.

We are thus of opinion that the district court did not abuse its discretion in awarding Rule 11 sanctions in this case.

The judgment of the district court is accordingly

AFFIRMED. 5