Matej Vydra, who is on loan from Udinese, came off the bench and slotted in what was his maiden Baggies goal in the 86th minute to steer the hosts to their first point in five Barclays Premier League games.
Downing said: "I just think, with the difficult week we have had, it is a big boost for us.
"I think it was that sort of feeling in the dressing room. I wouldn't say we were jumping (for joy), but certainly it stopped the rot, and that was important to do."
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