World No. 1 Rafael Nadal of Spain won his first match at Wimbledon since he became the 2008 champion as he beat wild card Kei Nishikori 6-2, 6-4, 6-4 in the first round. Nadal, who missed last year's tournament because of knee tendinitis, lost serve only once against Nishikori and committed just 16 unforced errors. He has been in good form, winning his fifth French Open title last month. 