Why does Andy Murray wave his fingers in front of his eyes after some points?

Answers:

Does Maria Sharapova get enough credit for being gracious in defeat?

Yes, he does this to indicate to the ball boy that he would like a towel. The ball boy will then bring him one. Andy Murray is actually a little obsessive about this. Late in matches, he'll ask for the towel after every single point and occasionally the chair umpire gets angry at him for delaying.
He's got a SF match at the Pacific Life Open tonight. See if you notice it.

Raquet Help?

Maybe he's asking for a towel??

Who will win in Monaco, Federer, Nadal or Djokovic?

Same reason most players do it - to indicate to the ball boy/girl to give him his towel.

Which brand of sports clothing is better: UnderArmour or Nike?

cuz he's a retarded butthole! Go Tim Henman! The people's champ

Will Andy Murray be able to win Wimbledon? I think he will, he is a good player now and can get a lot better.?

For a towel. Question, why does he leave his mouth open like a dumb jock and move his jaw around like he broke it? Screw Murray! GO TOMMY HAAS!

What do I need to look for in a tennis racket?

He asks the ball boy / girl for a towel. He's not the only one, many other players (like Marat Safin) do the same.

Where can i get lead tape?

for a towel to wipe his eyes