'You don't peak every week. One has to keep playing.' 'It's a sport where you have to play at least 25, 30 weeks a year.' 'You have to keep your head down and go with the flow.'
Images from matches played on Day 5 at the Australian Open in Melbourne Park on Friday
Images from Day 1 of the US Open in New York, on Monday.
It was a day of surprises at Flushing Meadows in New York as seeded players were knocked out one after the other on Friday.
Images from all the action from Day 1 of the Wimbledon on Monday.
Croatian wunderkind Borna Coric offered emphatic proof of his potential when he crushed Rafael Nadal in the Swiss Indoor tournament on Friday before local hero Roger Federer cruised into the last four.