Roger Federer was left waiting until almost midnight to start his US Open fourth round match on Monday, but made up for the delay with a brutal 6-1 6-2 6-0 win over Argentine Juan Monaco to reach the quarter-finals.
The five-time champion took the first set in 18 minutes and barely slowed down after that as the third-seeded Swiss eliminated his unseeded opponent in just 82 minutes under the Arthur Ashe Stadium court floodlights.
The lightning-quick win, which came as rain clouds gathered and mist filled the air at the National Tennis Center, marked the Swiss master's 30th successive trip to the quarter-finals of a grand slam event, dating back to the 2004 French Open.
The 16-time major champion advanced to a mouth-watering clash against 11th seeded Frenchman Jo-Wilfried Tsonga, who rallied to overcome eight-seeded American Mardy Fish in five sets earlier in the day.
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