John Isner and Nicolas Mahut, who played the longest tennis match in history last year at Wimbledon, both cruised to victories in their opening matches at the Newport ATP event.
Top seed Isner needed just 63 minutes to beat Karol Beck, 6-3, 6-2, in a first-round match on centre court at the Hall of Fame Tennis Championships on Tuesday.
Mahut dominated Sebastian Decoud 6-1, 6-0, in just 51 minutes.
"It's something we're not used to," Isner joked of the quick matches. "The points actually aren't grinding like hard court or clay. It's good to go out there and get a real good sweat. Any match that's this quick is good, especially the first round.
"I'm just glad when I picked my opponent at the draw party, I didn't pick him," he continued. "I would love to play him again -- not in a first round."
Isner outlasted Mahut in 11 hours, five minutes at the 2010 Wimbledon. They met again last month with Isner winning in three sets in a match that lasted about two hours.
"If we play each (here) it's in the final, then we'd both be happy," Mahut said.
The top seed has never won the title in the 35 years of this event.
In other first-round play, wild card Denis Kudla survived 24 aces against him to beat Ivo Karlovic, 7-6 (7/4), 4-6, 6-4; qualifier Jimmy Wang upset third-seeded Igor Kunitsyn 4-6, 7-5, 6-2 and No. 8 seed Tobias Kamke beat Alex Bogdanovic 7-6 (3), 6-3.
Also, Tommy Haas got past Michael Berrer, 7-6 (9), 6-4 and Amaud Clement beat Ryan Harrison, 6-4, 6-1.