He's braced for his Wimbledon semi-final against Jo Wilfried-Tsong this afternoon, and the pouring rain is unlikely to improve Andy Murray's famously grumpy demeanor .
The dour-faced Scot has so far lived up to his peevish reputation, giving typically monosyllabic responses to reporters and throwing his toys out his pram at the slightest hint of criticism.
The fourth-seed Scot plays in his fourth consecutive SW19 semi-final, having previously been beaten by Andy Roddick and Rafael Nadal (twice).
With that in mind, we've scoured the land for other sourpuss faces in the public eye. Feast your eyes on this grumpy lot.
Victor Meldrew/ Richard Wilson
Grace Van Cutsem (below left)