Ohio - Australian Bernard Tomic booked a third-round spot at the ATP Cincinnati Masters on Tuesday, the teen's 6-4, 6-3 defeat of American Brian Baker settling up a likely meeting with Roger Federer.
The top-seeded Swiss, going for a fourth trophy in the US Midwest, still has to win his opening encounter on Wednesday against Alex Bogomolov of Russia.
But German-born 19-year-old Tomic, who advanced with seven aces, saved all six break points he faced and finds the challenge is still inviting.
"If I get the chance to play Roger, It will be very interesting," said the World No 49, the only teen in the top 50. "I played him in the Australian Open fourth round and learned a lot from that match.
"I'm improving my game and getting stronger. People expect a lot from you and you have to keep working hard. But I think mine is paying off.
"I've still got a few more years to reach the peak of my game."
Women's third seed Samantha Stosur worked for 2 1/2 hours before finally overcoming Anabel Medina Garrigues of 6-3, 6-7 (6-8), 6-4 to reach the third round after a bye.