Ashley Williams will be having nightmares about Diafra Sakho for some time.
Since the West Ham striker was introduced at halftime of Sunday's contest, the Swansea centre-back had a torrid time trying - and failing - to slow him down.
After striking the post and drawing a red card earlier in the half, Sakho once again beat Williams before finally getting his just reward for an incredible 45 minutes of work.
In only nine appearances on the campaign thus far, Sakho has now found the net seven times.