• Roger Federer (R) of Switzerland and Novak Djokovic of Serbia

Roger Federer (R) of Switzerland and Novak Djokovic of Serbia (Photo : REUTERS/Ahmed Jadallah)

17-time Grand Slam winner Roger Federer might not have been as dominant as he was during his prime, but he's still one of the best netters today at the age of 33. But in a recent interview with Vague Australia via Tennis World USA, the Swiss Master confessed that there was a point during his heydays when he felt as unbeatable as the game of Pac-Man.

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Federer was referring to his incredible run in 2006, a period in his career in which he was at his peak, winning 12 out of 16 tournaments (including the Australian, Wimbledon and US Open) and finishing the season on 29 match winning streak.

"That year I won, I think, 12 of 16 tournaments. I I felt like in the game Pac-Man. I felt a normal player, then I became a player who was not able to lose. I experienced something I never thought was possible. In 2006, I lived a lot of really exciting moments," said Federer, who has already bagged two titles this season.

Widely recognized as the greatest tennis player of all-time, Federer said the first time he became the world's no.1 player in 2004 was the most satisfying feeling he ever had more than any accomplishment he garnered throughout his legendary career.

"In 2004, for the first time, I became world no. 1, and being the best, to excel in something, is an amazing feeling, perhaps the most beautiful. Staying on top is very difficult," Federer added.

Federer, who recently finished runner-up to world's no.1 Novak Djokovic at Indian Wells, decided to skip the Miami Masters this week to better prepare himself for a grueling clay-court season. At the French Open, Federer along with the rest of the field will try to end Rafael Nadal's attempt to win his 10th title at Roland Garros.