Kieran Trippier arrived at Tottenham Hotspur from Burnley during the summer transfer window.
Walker’s position appeared under threat when Trippier moved to White Hart Lane before the season started.
However, the 25-year-old right back has responded to the pressure put on his place - and put in some of his best performances in a Tottenham shirt this season.
"I think last season I was always playing catch-up having missed pre-season which is vital for any footballer," Walker said.
"That gets the engine running and I didn’t get it running and I was still trying to get it running during the season when everyone was halfway through the season.
"I’ve tried to get my head down this season and I’ve got good competition with Kieran coming in so it has made me push my game on."
Walker’s excellent form has firmly established his place as Spurs first choice right back, with Trippier’s first team chances limited so far.
Trippier has generally had to make do with playing in cup competition, and he has only made one Premier League start to date.
Walker, meanwhile, has been a virtual mainstay in the Lilywhites’ starting line up, and he has won over many of his critics.
Tottenham currently have the best defensive record of any side in the Premier League, having conceded just 16 times over the term to date.