By FOX SPORTS Staff
Vertonghen joined Spurs from Ajax last summer and has since featured in 45 out of 50 of the club's fixtures in all competitions this season.
The versatile 26-year-old, who has often been deployed as a left-back but is equally capable of playing in the centre of defence, has also contributed to Spurs in the attacking third, scoring six goals so far this season.
His impressive displays for Spurs led him to being included in the Premier League Team of the Year last Sunday.
Parker believes Vertonghen has been a revelation for Spurs this season and backed the Belgium international to get even better in the future.
"You probably wouldn't expect me to say anything else, but Jan's been nothing short of fantastic, an unbelievable player," Parker was quoted as saying by the official Spurs website.
"He shows great composure on the ball, works hard, is an athlete and you've seen the goals he's scored as well.
"He's been massive for us this season and you can only see him getting stronger and stronger.
"Technically, he's a very gifted footballer. He's like a Rolls Royce, he glides around the pitch so effortlessly, he can step out with the ball and he's nicked a few goals as well. That's invaluable."
Both Vertonghen and Parker are expected to feature for Spurs when they take on Southampton in their next Premier League fixture.