Day 1 of Wimbledon is upon us, with defending champion Djokovic up 1st on Centre Court

Novak Djokovic in action during his match with Alexander Zverev during day four of The Boodles at Stoke Park, near Stoke Poges, England, Friday June 26, 2015. (Mike Egerton/PA via AP) UNITED KINGDOM OUT NO SALES NO ARCHIVE (The Associated Press)

Current Wimbledon men's singles champion Serbia's Novak Djokovic gestures during a press conference at the Wimbledon Championships at the All England Lawn Tennis and Croquet Club, in Wimbledon London Sunday June 28, 2015. The Wimbledon tennis championships begin on Monday. (Adam Davy/PA via AP) UNITED KINGDOM OUT (The Associated Press)

The Latest from Wimbledon (all times local):

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11:15 a.m.

Day 1 at Wimbledon is upon us, and Novak Djokovic is first up on Centre Court.

The defending champion from Serbia will take to the grass at about 1 p.m., but it will be no walk in the park against Philipp Kohlschreiber of Germany.

Djokovic won his second title at Wimbledon last year, beating seven-time champion Roger Federer in five sets. The two could meet in the final again this year.

Stan Wawrinka, who beat Djokovic this month in the French Open final, is also scheduled to play on Centre Court, taking on Joao Sousa of Portugal.

In the women's draw, top-seeded Serena Williams will continue her bid for a true Grand Slam by taking on Margarita Gasparyan of Russia on Court No. 1. Maria Sharapova, the 2004 champion at the All England Club, will be up against Johanna Konta of Britain in the main stadium.