Liam and Sophia looked pretty cute together as they watched Andy play in a match against Milos Raonic at the O2 Arena on the third day of the tournament.
The couple, who began dating last year, looked to be focused on the game as they switched between the screens and on-court action.
'Kiss You' singer Liam had earlier drummed up support for former Wimbledon champion Andy, telling fans on Twitter: "Come on @andy_murray let's get behind him best of luck #MurrayFTW."
And it seems to have worked, with Andy winning the match in straight sets.
Afterwards, Liam met Andy backstage and he may have picked up some tennis tips along the way!
Posting a photo on Twitter, Andy said: "Great to meet you @Real_Liam_Payne thanks for your support tonight and make sure you keep working on that serve!"
Returning the compliment, Liam replied: "Congrats @andy_murray pleasure to meet you."
In other news, Liam will be joining his bandmates this week for a very special performance for BBC Children In Need.
The global boyband will be performing their current single 'Steal My Girl' and brand new single 'Night Changes' live on EastEnders' iconic Albert Square.
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Watch 1D's video for 'Steal My Girl' below: