from India Times.com
by David Waldstein
Federer has stirred curiosity on the tour since he unveiled an unusual return of service last month in a tournament in Cincinnati.
Before returning an opponent's second serve, Federer, on a few occasions, darted forward to the edge of the service line and took the ball quickly with a little halfvolley. [...]
He began using it in practice. His coach, Stefan Edberg, encouraged him to keep trying, even if it felt awkward, even if he felt a bit like a prisoner stepping forward to face a firing squad. [...]
"When you lose a point with it, you feel a bit ridiculous," Federer said Tuesday after employing it a handful of times in his 61, 62, 62 victory over Leonardo Mayer in the first round of the United States Open. "But when you win the point, it's a great feeling." [...] "Sometimes I stand there and I'm like, 'Should I or shouldn't I?' " Federer said. "And then it's like, 'OK, whatever, I'm going.' [...]
The first time the fans in Arthur Ashe Stadium saw it Tuesday, in the first game of the second set, many of them let out an "Oooohhhh." Mayer, under pressure, tried to hit a passing shot, but it went long. On another occasion, Federer's block backhand went into the net. On another, Mayer doublefaulted, perhaps rattled to see Federer attacking again.