Federer and Nadal featured in doubles action with each other for the first time ever.
Nadal was seen advising Roger Federer during his match against Nick Kyrgios.
Nadal is currently 3 behind Federer's 19 men's singles Grand Slam title record.
Nadal and Federer have won five titles apiece including two Grand Slams each in 2017.
Federer has lost just four times in 43 matches in 2017 winning five titles along the way.
Nadal has finished as a runner-up on two occasions in London.
Nadal achieved the men's singles number one ranking for the first time since July 2014.
The inaugural event in Prague turned out to be a huge success.
Nadal is at the top of the world rankings with 1960-points ahead of number two Federer.
Nadal was seen chatting with Federer during the break in between the first and second sets.
Federer and Nadal played on the same side of the court for the first time at the Laver Cup.
Djokovic and Murray are both expected back in tennis action in 2018.
Nadal is just three titles behind Federer's 19 majors following his US Open triumph.
McEnroe will captain the world team in the inaugural Laver Cup.
Nadal has won five titles including two majors on his way to securing the number one ranking.
Federer and Nadal are keen to play doubles with each other at the 2017 Laver Cup.
Nadal and Federer could play doubles for Team Europe in the Laver Cup.
Nadal has never won the ATP World Tour Finals and wants to accomplish it in 2017.
Nadal won his 16th major title at the 2017 US Open and is 3 behind Federer.
Nadal currently holds a 1960-point lead over Federer going into the final part of the 2017 season.
Wilander believes there is a big difference between Murray and the rest of the Big Four.
Kyrgios is known for stepping up whenever he faces a big name.