Tottenham boss Ange Postecoglou was delighted with their clean sheet for victory at Luton.
Micky van de Ven scored the only goal of the game, with Yves Bissoma seeing red.
Postecoglou later said of his centre-backs Van de Ven and Cristian Romero, "They've been great all year, both of them, the whole back four and Vic. I think a big part of that is Romero because when you look at it, it's Destiny's first year in the Premier League, Micky's first year in the Premier League, Vic's first year and Porro just beginning his Premier League career, but they've got a World Cup winner beside them and I think he makes them feel like they belong. They feel really comfortable having him beside them and you can see them flourish.
"Micky was outstanding today with the way he dealt with it. We knew when playing here against Luton we would have to deal with a lot of long balls and physicality, but you know Micky has outstanding physical qualities but he's also maturing and learning as a player as well.
"All of them, Emerson and Benny when they came on, I thought the guys who came on today and needed to defend did really well. Again credit to Matty Wells as well who works hard with them every day."