It's good news for Andy Murray, he has won his latest match at the ATP World Tour Finals in London.
He beat Fernando Verdasco 3-1 in a four set match at the O2 Arena.
Andy will now have to wait for the match between Roger Federer and Juan Martin del Potro to find out if he is in the semi-finals.
A straight sets win would have taken him through, but Verdasco held on to one, meaning Andy has a nervous wait until Thursday evening to find out.
If Roger Federer wins Andy will make it through to the next round but if Del Porto wins the match things are more complicated.
If he wins in straight-sets Andy is out, while a three-set win for Del Potro would see it come down to the percentage of games won by Murray, Federer and Del Potro.