John Isner, the highest-seeded U.S. player in the men's draw at No. 19, lost in five sets to Mischa Zverev at the Australian Open -- one of several American men to stumble Wednesday in Round 2.

Alexander Zverev reached his 21st Masters 1000 semi-final on Monday by ending the Canadian title defence of Alexei Popyrin 6-7 (8/10), 6-4, 6-3 at the ATP Toronto Masters. "After losing the first ...

Earlier in the week, Zverev joined the long list of players criticizing the extended two-week format of some Masters 1000 tournaments while speaking with Sam Querrey, John Isner, Steve Johnson ...

4-Alexander Zverev (GER) beat 29-Borna Coric (CRO) 6-4 6-4 .. Semi-final .. 4-Alexander Zverev (GER) beat 16-Pablo Carreno Busta 7-6 6-2 (ESP) 14-John Isner (USA) beat 5-Juan Martin del Potro 6-1 ...

Isner fired 16 aces and needed only 56 minutes Tuesday to dispatch fellow American Tommy Paul 6-3, 6-3 and reach the third round at the ATP and WTA Cincinnati Open.

After his defeat against Zverev in the semifinals, Shelton ended his chances of achieving the Canada-Cincinnati double. A feat only Nadal has accomplished in the past two decades. Indeed, the Spaniard ...