Tenth-seed Meghann Shaughnessy survived a barrage of powerful winners from Alexandra Stevenson to book a second-round spot with a 6-7 6-2 7-5 win.
Robertson took the initiative, emulating Zhang's work in the previous game with a series of powerful winners, while Emms started to show her touch at the net.
Trying to trade powerful winners with Williams at the outset of the match, the Belarussian found no success, and was sunk into a 5-0 hole by the three-time U.S. Open champion in less than 20 minutes.
So long as integration with the world economy produces some powerful winners as well as losers, political support for it looks assured.In the longer term, the future of Russia's pro-western policy depends on whether Mr Putin is able to stop the country's decline.
But the Spaniard turned the tide in the second, punishing Murray's wayward groundstrokes with powerful winners.
Playing with a bandaged thigh, Tanasugarn, of Thailand, clinched the victory with a powerful forehand winner.
The 20-year-old Wozniacki, playing her first major as the world's No. 1 player, finished off Sevastova in 1 hour 20 minutes, capping the match with a powerful forehand winner.
However, the CIS Cup holders were back in front on 72 minutes after Boyd again combined with Beasley, meeting the midfielder's cross with a powerful headed winner and allowing Rangers fans to breathe a huge sigh of relief.
There would not have been sufficient light to play a fifth set, but Federer solved that problem, too, in the tie breaker: hitting an ace and a powerful service winner to get to 6-3 and then coming up with another ace at 6-5 to seal the victory in four sets on Court Philippe Chatrier.
A powerful forehand winner down the line clinched the set in 42 minutes.
