LONDON — Tottenham manager Mauricio Pochettino urged his players not to relent after they moved back into the top four with a 1-0 win over rivals Arsenal in the North London derby.

Harry Kane’s 49th-minute header proved the winner as Spurs moved into third, above Chelsea and seven points clear of their neighbours.

The result followed the win against Manchester United and last weekend’s draw at Anfield, and leaves Spurs with seven points from nine against three of their closest rivals ahead of Tuesday’s Champions League round-of-16 first leg at Juventus.

“We are doing a fantastic job,” Pochettino said afterwards. “I’m so pleased because this is a key period when you have to fight for the battles, you need to fight for the top four and the three points. We are in the battle.

“Then arrives the Champions League, a competition that excites our fans, us. Always you dream to play in these type of games. We arrive in a very good moment for us.

“I think it’s important for the belief of the team, for the confidence. You know very well that football is about the trust, confidence and belief. A clean sheet against United and again here today, I think we deserved more against Liverpool but we took the draw.

“We feel very proud. The performance was amazing, fantastic. We played amazing football, we created a lot of chances. We had the capacity to push them and create many, many chances. I’m very pleased with the players and they deserved the full credit. I thought they were fantastic. I want to congratulate them and keep going.”

Kane’s goal was his seventh in Premier League north London derbies and only Emmanuel Adebayor, who played for both clubs, has scored more in the fixture, with nine.

“Of course Harry is one of the best. In the last three years, I have repeated that he is one of the best strikers in the world,” Pochettino said. “Sometimes it’s because you believe he’s my player and I try to praise him, no?

“I am telling you and I tell you again because in our experience of football, he is one of the best, because he deserves that, to be one of the best. It’s so good to have him in our side.”

He also hailed Mousa Dembele, who controlled the midfield after similarly impressing in the matches against United and Liverpool.

“Last season he played so well, and then at the end of the season he suffered a problem in his ankle, struggled during preseason and now is again feeling good,” Pochettino added.

“The problem is about his fitness, no? Because, that is about his quality, there is no doubt that like I have told you many times, for me he is a genius, and unbelievable player. But we must be careful about his fitness, it is good and he can train and, he can make this type of performance because he is a great talented player.”

But he was not impressed with a question about why he left Toby Alderweireld, who returned from a three-month injury absence against Newport midweek, out of the squad, with Davinson Sanchez partnering Jan Vertonghen at centre-half.

“After the game I need to explain this? You think I need to explain why I picked one or another? Why? I need to pick 11 players. If I explain why I don’t play Alderweireld, I need to explain why for Danny Rose, [Victor] Wanyama, [Fernando] Llorente, Michel Vorm, Harry Winks.

“The reason is that I believe the eleven players that played today were the best to win, we won, if we lose maybe I accept the question, because I was wrong in my selection. But after three points!

“I don’t take like a criticism, it is your opinion. He played like a different player against Newport, and the decision was be out of the squad. But that is, sorry, the club, Daniel Levy pay for [me] to make decision, not to make happy the people.”