Sock, Johnson, Harrison get big wins in Rome

The American men took center stage on Sunday for the first day of the Italian Open, playing in four of the five main-draw matches.

They did pretty well for themselves, too, going 3 for 4, all against formidable opponents.

Jack Sock, with a convincing 6-3, 6-4 win, leveled his career head-to-head with longtime Top 10 mainstay David Ferrer at two wins apiece.

Up 4-2 in the second set, he showed off his sliding and racquet skills when he managed to put away a winner while running diagonally away from the net:

Before that, Steve Johnson defeated three-time Grand Slam champion Stan Wawrinka 6-4, 6-4 despite the Swiss making shot ...

After shot ...

After shot ...

After shot:

On Next Gen Arena, Ryan Harrison beat higher-ranked Yuichi Sugita 7-6 (5), 6-3. No. 12 seed Sam Querrey suffered the Americans' only loss of the day, falling in two sets to Peter Gojowczyk, who has beaten Americans Tim Smyczek, Sock, John Isner, Reilly Opelka and Johnson this year.

Jared Donaldson took the court early on Monday, losing to Pablo Carreno Busta 4-6, 6-3, 0-6. Madison Keys, Frances Tiafoe and CoCo Vandeweghe are set to all kick off their main-draw campaigns on Monday as well.