Djokovic, Monfils and Muguruza advance at Wimbledon Championships

Serbia's Novak Djokovic returns to Slovakia's Martin Klizan during their Men's Singles Match on day two at the Wimbledon Tennis Championships in London Tuesday, July 4, 2017. [Photo: AP/Alastair Grant]

Three-time former Wimbledon champion Novak Djokovic was in action on Tuesday, facing Martin Klizan in the first round. 

With coach Andre Agassi looking on from the stands, second seed Djokovic claimed his first break of the match in the ninth game before serving out the first set 6-4. 

Klizan received medical treatment for a calf injury between sets before being broken again at the start of the second. 

The Slovakian duly threw in the towel while trailing 6-4, 2-0 and Djokovic advanced to the second round - the Serbian going forward to a meeting with Adam Pavlasek. 

Gael Monfils of France sits on the chair of a line judge during his Men's Singles Match against Germany's Daniel Brands on day two at the Wimbledon Tennis Championships in London Tuesday, July 4, 2017. [Photo: AP/Kirsty Wigglesworth]

Gael Monfils joined Djokovic in the second round, beating German Daniel Brands - the world number 216 - 6-3, 7-5, 6-4. 

The Frenchman, seeded 15th, will face Briton Kyle Edmund in his next match. 

A beaten ladies singles finalist in 2015, Garbine Muguruza took a step closer to her maiden Wimbledon title with a first round victory over Russia's Ekaterina Alexandrova.

Spain's Garbine Muguruza returns to Russia's Ekaterina Alexandrova during their Women's Singles Match on day two at the Wimbledon Tennis Championships in London Tuesday, July 4, 2017. [Photo: AP/Tim Ireland]

Spaniard Muguruza won in straight sets - 6-2, 6-4 - and will face either Yanina Wickmayer or Kateryna Bondarenko in the next round.