A former coach of Roger Federer believes the Swiss’ partnership with new coach Ivan Ljubicic will be good for the former World No. 1 as Federer aims to add another Grand Slam title at the tail end of his storied career.

Paul Annacone, who successfully handled Federer from 2010 to 2013, stated that Ljubicic will make some changes in Federer’s game and it will pay off in the key moments in the major tournaments.

"Roger and Ivan know each other really well and have spent a lot of time together as fellow competitors and as friends, and that's only going to help them,” Annacone shared to wimbledon.com.

“I expect any changes that Ivan makes to Roger's game are going to be subtle stuff. But those small, subtle changes can have the biggest impact at the right moments.”

Annacone joined Federer’s team in August of 2010 and helped Federer return to the World No. 1 ranking at the end of that year and the succeeding season as well. Under Annacone, Federer also won his 17th Grand Slam title at the 2012 Wimbledon Championships in what was Federer’s last majors title so far in his career.

Federer hired Ljubicic recently and replaced former coach Stefan Edberg, who handled Federer in the last two seasons. Federer made the final three times in the last eight Grand Slam tournaments but has failed to add to his Grand Slam total wins.

Despite coming up short in the majors championships, Annacone said that Federer under Edberg was a success.

"They had a really successful run, with Roger reaching three slam finals: at Wimbledon in 2014 and at Wimbledon and the US Open in 2015, and in all three of those matches he ran into a guy, Novak Djokovic, who was playing some phenomenal tennis,” Annacone added.

Federer, who is currently ranked World No. 3, is widely considered the best tennis player in the history of the sport owing to his 17 Grand Slam titles, the record for most titles in the men’s singles competition.

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