1D - (1S) - 2D - (2S)
3H - Pass - 4D - Pass
5D - All pass.
The player in question is West who holds:
QT9xx, JT9x, x, Axx
These are the four hands:
West leads a spade, east wins ♠K, ♠A and return a third Spade.
Declarer ruffs with the ♦A, and plays the ♣J.
At this point west thinks, "Most tables will be in 3NT which is at least -2. So we need at least 2 club tricks. Low it is..." and plays a low club.
Declarer wins, draws trumps and then squeezes West between the ♣A and the fourth heart, making 11 tricks.
(endposition: 2 hearts and ♣KT in dummy, AKQx hearts in hand. West cannot both hold the ♣A and JT9x of hearts)
Was West greedy, bad or just unlucky?

Help

Lead spade.