Igor Tudor was unable to say whether he deserved to continue at Tottenham after becoming the first Spurs head coach to lose each of his first four games in charge.

Tudor endured his most disastrous game yet as Spurs boss - and there is already plenty of competition despite his short 24-day tenure - as Atletico Madrid thrashed his side 5-2 in the first leg of their Champions League last-16 tie.

His questionable decision to drop experienced goalkeeper Guglielmo Vicario and hand 22-year-old Antonin Kinsky a first Champions League start backfired spectacularly, forced to U-turn after just 17 minutes when Kinsky's mistakes led to two of Atletico's three early goals.

Kinsky looked inconsolable when he was replaced by Vicario, who conceded just five minutes after coming on - Robin Le Normand scoring Atletico's fourth - at which time it became inevitable that Spurs would fall to a sixth consecutive defeat for the first time in the club's 143-year history.

And Tudor's assignments do not get easier from here. Spurs travel to Anfield to take on Liverpool on Sunday, live on Sky Sports, before having to endure the second leg of a European tie that is surely, somewhat embarrassingly, already over three days later.

Asked after the game if he deserves to carry on at Spurs, Tudor said: "No comment."

Explaining his decision to take off Kinsky, who received no acknowledgment from Tudor when substituted off, the Spurs boss said: "It is very rare. I have coached 15 years and never done this. It was necessary to preserve the guy and to preserve the team.

"The start of the game was too much for us in this moment when we are fragile, when we are weak.

"Kinsky was sorry. The team is with him. Me too. I was speaking with him. He understands the moment, he understands why he went out. He is a very good goalkeeper. It is never about one player."

Commenting on what needs to happen ahead of facing Liverpool this weekend, he added: "I try to do my best. What a coach needs to do."

Sky Sports News' Michael Bridge in Madrid:

"You think you've seen it all but they'll have to be discussing his [Tudor's] future. It's very, very toxic. Some players will be unhappy with what happened during the game with Kinsky going off.

"I saw Joao Palhinha and Conor Gallagher running to console Kinsky - these are players that are worried about Kinsky's welfare. Igor Tudor didn't acknowledge Kinsky when he came off. It was the ultimate humiliation. There was a powerful tweet from David de Gea about it and I'm sure the players will be speaking to officials at Spurs.

"There has also been footage of Cristian Romero almost telling Tudor to take Kinsky off. I asked Tudor that and he denied it but if you look at the footage you do wonder if Romero did ask him to take him off.

"It's such a damaging defeat in so many ways. Tudor's future will come into question now. There has been no manager bounce and Spurs actually look worse. And it could get even worse before it gets better. Tudor was brought in to put fires out straightaway but more fires have been created."