Roger Federer has only won three tournaments since 2013, but the former world No. 1 likes his chances of winning the Wimbledon, which is scheduled to start on June 23.

Federer, who suffered an early exit at the 2014 French Open, has been a shadow of his old self over the past several months, but the Swiss tennis star got a huge confidence booster after winning at Halle.

The 17-time Grand Slam champion won the title at Halle on Sunday, and he insisted that he has always performed well at the Wimbledon every time he plays well at Halle.

"In the past, when I have played well at Halle, I have usually played well at Wimbledon," Federer said via ESPN. "They have been two of my most successful tournaments, so I hope that this title will bring me luck again. Last year it didn't work out, but it did many times before. So I hope it will be back to the good old days."

The 32-year-old Federer was seeded fourth in the upcoming Wimbledon behind top-seeded Novak Djokovic, second-seeded Rafael Nadal, and defending champion Andy Murray.

Djokovic was named as No. 1 seed despite losing to Nadal at the Roland Garros 2014 final. The Wimbledon committee based the ranking on the player's recent performance on the grass along with their world ranking points.

Former Wimbledon runner-up Mark Philippoussis knows that most players are already counting Federer out after a series of disappointments in Grand Slam tournaments, but he insisted that the seven-time Wimbledon champion will be a force to reckon with in the upcoming tourney.

"I am feeling Federer for Wimbledon this year," Philippoussis told The Irish Times. "I believe he has one more Grand Slam in him, and his best chance is at Wimbledon. Working with (new coach) Stefan Edberg leading up to this, Roger has been more attacking and if [he] plays again like at the Australian Open, then I am calling him to win this one."

On the women's side, five-time champion Serena Williams was named as top seed followed by Li Na, Simona Halep, Agnieszka Radwanska, and French Open champion Maria Sharapova respectively.