Rafael Nadal
Rafael Nadal is not one of the favorites to win the 2015 Wimbledon championship. Reuters

Novak Djokovic didn’t have any trouble in his first match at Wimbledon 2015, and he’s expected to cruise his way through most of the tournament. After advancing beyond the opening round, Djokovic remains a heavy favorite to win this year’s championship.

Following his match on Monday, Djokovic has been given 11/8 betting odds to win his third ever Wimbledon title. The defending champ beat Philipp Kohlschreiber 6-4 6-4 6-4. He’ll take on either Lleyton Hewitt or Jarkko Nieminen in the next round, and he can’t face another member of tennis' “Big Four” until the finals.

Andy Murray is the second favorite, even though he is the No.3 player in the world. No.2-ranked Roger Federer has the third-best odds after losing to Djokovic in last year’s finals.

Despite what the betting odds say, French Open champion Stan Wawrinka has said that Federer is Djokovic’s biggest competition.

“You want an order? I'd put Novak, Roger, then Murray,” Wawrinka said a little over a week ago.

"If I put Roger next, I'm seeing the way he's playing," Wawrinka continued. "Even if he lost a few matches this year, I'm sure he's going to be ready for the grass."

Both Murray and Federer are coming off grass-court tournament victories. Murray has advanced to at least the semifinals every year since 2008, while Federer had a surprising second-round exit in 2013.

Nadal was the fourth favorite at some betting websites before the start of the tournament, but he hasn’t been given the same level of respect at every online sports book. Paddy Power lists Wawrinka as the fourth favorite, making his betting odds nearly twice as high as Nadal’s. Bovada.lv listed Nadal as a 12/1 favorite, and ahead of Wawrinka (14/1), on June 8. On Sunday, Bovada.lv listed Nadal at 16/1.

Nadal has struggled in 2015, falling to No.10 in the world rankings. The Spaniard hasn’t even reached the quarterfinals at Wimbledon since 2011, suffering first, second and fourth round defeats in the last three years. The last time he won in London was in 2010.

"I have the best motivation: to be back where I was. And I’m gonna work for it," Nadal told Kevin Mitchell of the Guardian.

The results have been mixed for Nadal since bowing out early at Roland Garros. On June 16, Nadal was stunned by No. 79 Alexandr Dolgopolov in his only match at AEGON Championships in London, but it came just two days after he won the Mercedes Cup in Stuttgart. It was his first grass-court tournament win since 2010.

Grigor Dimitrov and Milos Raonic lead the next tier of competitors, and their 33/1 betting odds make them dark horse candidates to win the title. Both players reached the semifinals of the tournament last year, though they previously had never advanced beyond the second round at Wimbledon.

Below are updated Wimbledon 2015 betting odds during the first day’s action, courtesy of Paddy Power.

Novak Djokovic 11/8

Andy Murray 5/2

Roger Federer 13/2

Stan Wawrinka 12/1

Rafael Nadal 20/1

Grigor Dimitrov 33/1

Milos Raonic 33/1

Tomas Berdych 40/1

Kei Nishikori 50/1

Marin Cilic 50/1

Nick Kyrgios 50/1

Jo-Wilfried Tsonga 50/1

John Isner 150/1

Richard Gasquet 150/1

Kevin Anderson 150/1

Dominic Thiem 200/1

Bernard Tomic 200/1

Gael Monfils 200/1

Leonardo Mayer 200/1