Foster stood between Spurs and another big away win and was serenaded by chants of “England’s number one” as he again pulled out a top-drawer stop from a stinging Eriksen drive. Then he pulled off brilliant saves from the Dane and Alli.
Predicatably, Albion’s shock opener came from a set-piece. Spurs, disrupted by Toby Alderweireld going off on a stretcher with a nasty looking knee injury, failed to deal with a corner.
The chance looked as if it had gone when Hugo Lloris saved James McClean’s volley at the foot of his post but Chadli rammed home the rebound.
Spurs boss Mauricio Pochettino said: “I am happy but we have to sort a way out to be more clinical. We were a little bit unlucky and Foster was man of the match.”
But Pochettino faces a anxious wait to discover how long Alderweireld, who will miss Tuesday night’s Champions League trip to Bayer Leverkusen, will be out. He said:
“It’s very difficult to see him going to Germany.”