No. 1 Novak Djokovic began his defense and the start of Wimbledon against Germany’s Philipp Kohlschreiber at Center Court at the All England Tennis Club Monday in London.

The Serbian star has jumped out a first-set lead after firing off four aces and winning all three of his attempts at the net. After a second round elimination last year, Kohlschreiber, 31, unfortunately drew Djokovic as he was trying to erase his poor final performance at the French earlier this month.

Djokovic is the only one of the men’s “Big Four” to take the court Monday, but rising Swiss Stan Wawrinka, the player who topped Djokovic at Roland Garros, will play on the opening day against Portugal’s Joao Sousa.

No. 8 Milos Raonic of Canada faces Spain’s Daniel Gimeno-Traver at roughly 11 a.m. ET on Court 3. Raonic sat out the French due to a nerve condition in his right foot but he did return to the grass in the Aegon Championships last week before falling to Gilles Simon at the quarters.

The women’s side features much more star power with No. 1 Serena Williams erasing an early 2-3 deficit to go up 6-4 against Russian 20-year-old Margarita Gasparyan. Williams hasn’t made the later stages of the tournament the last two years, and looks to get off on a much better start after claiming the year’s first two slams.

No. 4 Maria Sharapova will square off against Australia’s Johanna Konta at roughly 11 a.m. ET. The two have never met before, but like her rival Williams, Sharapova hasn’t enjoyed success at Wimbledon since she last won the title in 2004.

No. 7 Ana Ivanovic takes the court against China’s Yi Fan Xu, who’s yet to win a singles match this season. Meanwhile, No. 6 Lucie Safarova faces American Alison Riske, a 24-year-old from Pittsburgh who has gone 10-14 in singles play this year.

Time: 9 a.m. to 3 p.m. ET

TV Channel: ESPN

Live Stream: A live online stream is available at Watch ESPN