6. Paul Annacone

During the 1980s, Paul Annacone was a successful professional tennis player, having a career-high ranking of World Number 12 in 1986. He even won a Grand Slam at the Australian Open of 1985 at the doubles level and achieved a career-high doubles ranking of World Number 3.

But Annacone is most famous for his work with Pete Sampras – one of tennis’ greatest of all time. They had initially a 7-year partnership, from 1995 to 2001. After that, Annacone took a gap year to recharge his batteries.

He again came back with Sampras and helped him win the 2002 US. Sampras won 10 of his total 14 Grand Slam titles with Annacone being his mentor.

Annacone then coached Tim Henman for 3 years. In 2010, he took up the coaching responsibility of Roger Federer and helped the Swiss win two of his Grand Slam titles.

After his work with Federer, he coached Sloane Stephens and Stan Wawrinka and now is the coach of American Taylor Fritz.

7. Ivan Lendl

Ivan Lendl won up to 8 Grand Slams during his playing career. But he wasn’t satisfied and remained connected with tennis even after his retirement.

Lendl took over as the coach of Andy Murray – who had enormous potential but had tasted not much success at the Grand Slam level. Lendl had a key part in Murray’s becoming a Slam champion from being a Slam contender. He helped Murray win his first ever Major title in 2012 at the US Open.

One year later, he coached Murray to the Wimbledon title, helping the Scot achieve a lifelong dream. In 2014, Murray hired Amelie Mauresmo as his coach and their partnership ended there.

But their relationship restarted in 2016 when Murray won the Wimbledon Championships and the Olympic gold, finishing the year as World Number 1 for the first time.

Now Lendl serves as the coach of Alexander Zverev.