The most prestigious of tennis’ four Grand Slam championships is Wimbledon, and it’s the only major played on grass – a playing surface rather unfamiliar to many tennis players who grew up in the United States or Canada. This year’s tournament in London begins on July 2 and runs through July 15, the date of the men’s singles final. The betting favorite for the men is Roger Federer at +150.

Odds courtesy of OddsShark.com

Federer has won 20 Grand Slam tournaments overall, most in history. So he not only could be considered the greatest player in history but also the best on grass as last year Federer won a record eighth Wimbledon title, breaking a tie with American Pete Sampras in the Open era. Federer routed Croatia’s Marin Cilic 6-3, 6-1, 6-4 for his first Wimbledon title since 2012.

At age 36, Federer now carefully plans his playing schedule. Clay is his worst surface by far so he skipped the French Open and the entire clay-court season again this year to get healthy and better prepared for Wimbledon. The Swiss legend had been No. 1 in the world rankings but lost that to Rafael Nadal on Monday after Federer was stunned in the final of the grass-court Gerry Weber Open in Halle.