Absolutely no way would Roger Federer throw a match. Absolutely no way would Andy Murray take drugs! Both are real sportsmen and play to the best of their ability at all times, and have no need of artificial stimulants. Andy was the best man on the day, and the conditions suited him. A month ago, Roger was the best man on the day and the conditions suited him.
A quick look around the internet finds this -
"To date, Andy Murray and Roger Federer have played against each other a total of 16 times. The score is 8 wins and 8 losses each. Murray has won 8 times on hard courts versus Federer?s 7 hard court wins. Federer?s 8th win against Murray was on a grass court. They have never met on clay courts."
As always, Roger was a true gentleman in defeat, and the same can be said of Andy after the Wimbledon final.
By the way, it is the norm for the losing player in a tennis match to leave the court quickly, allowing the winner his time in the spotlight. The only exception to this is usually a grand slam, when both players stay on court till the presentation.