Olympic and US Open champion Murray, who claimed his third Aegon Championships trophy at the Queen’s Club on Sunday, defeated Japan’s Nishikori 6-2 7-6(5) in their exhibition match at the BNP Paribas Tennis Classic at the Hurlingham Club.
The Scot broke his opponent early on, racing into a 3-1 lead, and, despite losing his serve, went on to wrap up the first set comfortably.
World number 11 Nishikori battled throughout the duration of the second set – opening up a 3-0 advantage – but was unable to keep Murray at bay as the world number two took the set to a tie-break, clinching it 7-5.
World number one Novak Djokovic also enjoyed a victory, beating Bulgaria’s Grigor Dimitrov at The Boodles event at Stoke Park.
The up-and-coming Dimitrov took it to the Serb from the off and clinched the first set 7-5, but Djokovic was able to fight back, winning 6-3 10-6.
"Everything is going according to plan and hopefully I can get in the best possible shape for the start of Wimbledon,” said Djokovic.
“I know what I need to do in order to adjust from the slowest to the fastest service in a very short period of time.
"There's no bigger motivation than playing in the most prestigious tournament in the world in our sport, the one that I always dreamed of winning. I won it two years ago and it's definitely been the highlight of my career. I love playing at Wimbledon.
"Grass is the most special surface we have in the sport; the oldest also. We play on it only a few weeks a year so we better use it wisely. I like playing on it and it makes me aggressive on the court. Hopefully I can raise the level of my game as the tournament goes on."