Forster made a string of sensational saves at the Emirates Stadium to keep Saints’ clean sheet intact, and he drew huge praise from his good friend Ward-Prowse for his display.
The Saints keeper was beaten on one occasion, though, when Alexis Sánchez fired an angled shot past him in the second half, but Ward-Prowse was in the right place to avert the danger.
"I said to him I cleared one off the line for him, so he owes me a bit of thanks there,” said Ward-Prowse, laughing, before going on to express his admiration for Forster’s efforts.
“He's a fantastic keeper, and it's no surprise to see him pulling off saves like that. He's in fantastic form at the minute, and he's given us that solidity since he's been back.
"I think he's just given everyone that presence. He's a big guy, he's had a lot of experience and he's a top-class keeper. You could see that everyone seems settled playing with him.
"I'm a close friend of his and he's worked very hard to get back to where he is and it's great to see him out there. He deserves all the plaudits – he saved us those points today.”
Ward-Prowse has also backed Forster, who has kept a clean sheet in each of his four games since returning from a long-term knee injury, to be a key part of the England squad for this summer’s Euros if he carries on his form.
“I think he'll give a lot of competition to the fellow keepers, and it's exciting to see a keeper like him in the form he is going into the Euros,” said Ward-Prowse.
On the draw at Arsenal, the Saints midfielder added: "It's great. We took a lot of confidence into the game. We knew it was going to be a hard place to come, and I think all the boys to a man performed well.”