MEMORANDUM **

Anthony Zandonatti appeals pro se from the district court’s judgment dismissing without leave to amend his diversity action relating to foreclosure proceedings. We have jurisdiction under 28 U.S.C. § 1291. We review de novo the district court’s dismissal under Federal Rule of Civil Procedure 12(b)(6), Cervantes v. Countrywide Home Loans, Inc., 656 F.3d 1034, 1040 (9th Cir, 2011), and we affirm.

We affirm the district court’s dismissal of Zandonatti’s action because Zandonatti failed to raise any argument in his opening brief concerning- the district court’s grounds for dismissal, and has therefore waived his appeal of the district court’s ruling on the sufficiency of his allegations. See Smith v. Marsh, 194 F.3d 1045, 1052 (9th Cir. 1999) (“[Arguments not raised by a party in its opening brief are deemed waived.”).

The district court did not abuse its discretion in denying Zandonatti’s “joint motion to strike defendant’s motion to dismiss' and for proof of authority to represent”. See El Pollo Loco, Inc. v. Hashim, 316 F.3d 1032, 1038, 1041 (9th Cir. 2003) (setting forth standard of review *331 and explaining “[discretion is abused when the judicial action is ‘arbitrary, fanciful or unreasonable’ or ‘where no reasonable [person] would take the view adopted by the trial court’”). Contrary to Zandonatti’s contentions, the .district court did not abuse its discretion by ruling on defendants’ motion after giving Zandonatti notice under Wyatt v. Terhune, 315 F.3d 1108 (9th Cir. 2003), advising him that he was required to file a response to defendants’ motion to dismiss, and providing him nearly one month to prepare a response.

We reject as without merit Zandonatti’s contentions concerning defendants’ alleged procedural due process violations and the alleged prejudicial misconduct of defendants’ attorneys.

AFFIRMED.