Norman teamed up with Wawrinka as a coach in 2013 and together they spent four years, winning three Grand Slam titles.
Radek Stepanek, who announced his retirement earlier this month, could join Novak Djokovic's coaching team alongside Andre Agassi.
Carlos Moya has warned Novak Djokovic and Andy Murray that emulating Rafael Nadal and Roger Federer will not be as easy as it looks upon their impending returns.
Muguruza completed a brilliant year, winning Wimbledon with a victory over Venus Williams back in June.
Roger Federer's defeat to David Goffin at the ATP Finals in London was surprising, according to Rafael Nadal's coach Carlos Moya.
Paul Annacone believes Roger Federer and Rafael Nadal managed their fitness to perfection during their glorious revival in 2017.
Roger Federer has revealed how he had an aggressive nature in his early days as a tennis professional as he discusses how he grew from his teenage days to become a superstar.
Rafael Nadal has been backed to have a perfect end to 2017 as he returns for the Mubadala World Tennis Championship in December where a meeting with Novak Djokovic could happen.
Roger Federer will begin his campaign at the Hopman Cup, while Rafael Nadal and Novak Djokovic will get theirs underway in Brisbane and Doha, respectively.
The Grand Slam Board have announced a host of rule changes, including the introduction of a 25-second shot clock to be implemented in Melbourne.
Grigor Dimitrov won the ATP Tour Finals in London while runner-up David Goffin beat Nadal and Federer on his way to the finals.
The duo have won everything there is to win – 16 Grand Slams, 30 Masters Series titles and two Olympic gold medals.
Federer had a disappointing end to the 2017 campaign after losing the ATP World Tour semi-finals to David Goffin.
Former British number one Greg Rusedski believes Roger Federer will be rueing his missed chance of winning the ATP Finals after the absence of Rafael Nadal and Novak Djokovic.
Jana Novotna, who won 17 grand slam singles and doubles titles, has passed away aged 49 after a long battle with cancer.