Yep, that's what it reminded me of. Feigning injury at crucial points of the game.
The 'toilet' break was ridiculous. Eight minutes?! The guy has previous for it, taking his whole kit bag into the toilets including his mobile phone. The suspicion is that he's texting his coach.
Murray was entitled to be raging. If you read his full quotes it's not sour grapes either. There's no self pity there, just a rational (if heated) criticism of the way the way his opponent was bending the rules to the max.