Indian Wells: Roger Federer, who regained the world Number One ranking last month, is on a quest to make history in the California desert by winning an unprecedented sixth Indian Wells title.
The 36-year-old Swiss marvel continues to defy the aging process, claiming his 20th Grand Slam title and sixth Australian Open crown in January.
He has enjoyed a perfect start to 2018 by winning both events he has competed in and taking his career singles title tally to 97.
"He shows there is no limit," said third-seeded Grigor Dimitrov. "He keeps on proving it every year on the tour."
Federer opens the defence of his Indian Wells title by playing a second-round match against either American Ryan Harrison or Federico Delbonis of Argentina.
He also won this tournament three straight years beginning in 2004, and in 2012 as well as last year.
Federer comes into the elite event as the oldest ATP Number One in history. In the Open era, only American Jimmy Connors has won more titles than Federer, with 109.
Federer has played two tournaments this year and won both -- the other being the Rotterdam Open.
"For me to stand right here as world Number One in San Jose is very, very special for me," Federer said at a charity event in California.