However, rather than the defensive third, it was the West Ham box where Romero made a significant impression in the 11th minute.
Buoyed from Romero’s third goal of the season, Spurs spent the remainder of the first period searching for a second.
After offering very little before the break, a rejuvenated West Ham side gained a crucial foothold within seven minutes of the restart.
Richarlison was presented with the chance to make an immediate impact, but he could only glance his header wide from Porro’s inviting delivery. The full-back then took it upon himself to let fly, only for Fabiański to make a smart stop.
A failure to take those opportunities ultimately proved costly, as West Ham took full advantage of a defensive error to complete the turnaround.
Guglielmo Vicario could only push Destiny Udogie’s weak backpass into the path of the grateful James Ward-Prowse, who hit the post with his initial effort before tapping into an empty net from the subsequent rebound.
The ninth-placed Hammers frustrated Spurs for the remainder of the contest, ensuring the hosts remain in sixth position and without a win in five matches.
Flashcore Man of the Match: Jarrod Bowen (West Ham United)