ATP roundup: Ben Shelton among upset victims at Hamburg
Second-seeded Ben Shelton and defending champion Flavio Cobolli, the fourth seed, both were upset victims on Tuesday at the Hamburg Open in Germany. Home favorite Daniel Altmaier stunned World No. 6 Shelton 4-6, 7-6 (4), 6-4 in two hours, 51 minutes to advance to the quarterfinals.