Yet missing from his new outfit was Federer's monogram of his initials which he confirmed is still the property of Nike.
Japanese 24th seed Kei Nishikori also got off to a flyer, dispatching Christian Harrison 6-2 4-6 7-6 (7/3) 6-2.
Roger Federer began his title defence at Wimbledon with an easy 6-1, 6-3, 6-4 victory over Serbia's Dusan Lajovic at the Centre Court on Monday. John Isner defeated Yannick Maden in three sets and unseeded Americans Mackenzie McDonald and Jared Donaldson also advanced.
Roger Federer opened his Wimbledon account in familiar fashion but it was one very noticeable difference that sent social media into a frenzy. Sources say that Federer's agent Tony Godsick was seeking more money from Nike despite its promise to expand the "RF" line.
Third seed Cilic enjoyed a 6-1, 6-4, 6-4 win over Japan's Yoshihito Nishioka.
Kevin De Bruyne hails Belgium's defence for sparking win over Brazil
Belgium's frontline of Romelu Lukaku , De Bruyne and Eden Harzard posed a constant threat to the Brazilian backline. Or maybe this is year that England finally , finally, wins another major worldwide tournament.
Having backed up her 2017 U.S. Open triumph by reaching the French Open final last month, Stephens was considered a contender for the title at the All England Club.
Williams has a 14-match winning streak at the All England Club, with her sixth and seventh titles in 2015 and 2016, and a 10-match winning streak in Grand Slam action.
The 25 year old Australian, ranked 65 in the world, was born in Zagreb Croatia but now lives in Brisbane, a great city for tennis.
In the ninth game, Sloane recovered from match point at 30-40; then lost a game point before succumbing on the fifth match point to lose the set 6-3.
Former world number one Novak Djokovic had previously been sponsored by them.
Cilic, who reached the final at the All England Club previous year, defeated Novak Djokovic in last month's Queen's final in the build-up to Wimbledon 2018.
Williams, meanwhile, has been shunted off to Court One where she tackles Dutch outsider Arantxa Rus. I was aware that most of the guys who were playing great at Queen's were also continuing to play again over here.