Vincent Caravella appeals the district court’s 1 adverse grant of summary judgment in his products-liability diversity action. Having carefully reviewed the record, we find no abuse of discretion in the district court’s exclusion of the opinion of Caravella’s expert, see Bland v. Verizon Wireless, L.L.C., 538 F.3d 893, 896 (8th Cir. 2008), or in the court’s discovery rulings, see Ahlberg v. Chrysler Corp., 481 F.3d 630, 637 (8th Cir. 2007). We also agree with the district court’s determination that, without an expert opinion as to causation, there were no trialworthy issues on Caravella’s claims under New York law. See Bannister v. Bemis Co., 556 F.3d 882, 884 (8th Cir. 2009) (reviewing de novo summary *680 judgment order and interpretation of state law). Accordingly, we affirm. See 8th Cir. R. 47B.