Andy Murray hasn’t played a competitive game of tennis since crashing out of Wimbledon in the summer.
The Brit lost his world No 1 status this year after ending his season early due to a hip injury.
He has returned to the practice court but will not play at the ATP Tour Finals in London next week.
Murray will, however, play in front of 11,000 people against Roger Federer on Tuesday in Glasgow.
But why are the two tennis greats meeting up outside of an official ATP tournament?
Here’s all you need to know about Murray vs Federer…
Why is Murray vs Federer being played?
Andy Murray and Roger Federer will not be playing competitive tennis on Tuesday.
Instead, their match is part of a charity fundraiser event called Andy Murray LIVE.
It will take place in the SSE Hydro in Glasgow, the home court during Great Britain’s remarkable run to Davis Cup glory in 2015.
This is the first time Murray will play Federer in Scotland.
What is Andy Murray LIVE?
Andy Murray LIVE is the name for Tuesday’s charity event in Glasgow.
But Murray vs Federer is not the only item on the menu.
Murray will also team up with brother Jamie for a doubles match against Tim Henman and Mansour Bahrami.
The funds raised will go to the charity Unicef and local charities.
“Last year was such a fantastic night and to raise over £300,000 for Unicef and Young People’s Futures in our first year was amazing,” Murray said.
“This year is going to be even bigger and better and I am so pleased to be able to bring Roger to play in Scotland for the first time – he will get a chance to see for himself just how enthusiastic Scottish fans are, and what a great venue The SSE Hydro is.
“It is also important for me to be able support Unicef again this year, and to help a different local charity as well.”
When does Murray vs Federer start?
Andy Murray vs Roger Federer will not start until around 7.30pm in Glasgow.
Tuesday’s match is the first on court before Andy Murray teams up with his brother Jamie for a doubles encounter.
Doors at the SSE Hydro open at 6pm.
While this isn’t a competitive match, it will be interesting to see how seriously both Murray and Federer take it.
The pair have clashed 25 times during their professional careers, with Murray winning 11 and losing 14 times.
Federer has won his last FIVE meetings with Murray – the Scot not beating his Swiss counterpart since edging their 2013 Australian Open semi-final clash 6-4 6-7(5) 6-3 6-7(2) 6-2.