Tottenham’s difficult start continued on Saturday as they laboured to a 1-1 draw with winless Watford.
Only Dele Alli’s late goal – his first since January – stopped them from suffering another embarrassing defeat.
“You can see it two ways,” said Alderweireld. “It’s a big opportunity for us on Tuesday. We must use that.
“Then Sunday is a big opportunity. Look, we’re a team, let’s go again. Let’s go, like that second half. Our best, it’s all we can do.”
Mauricio Pochettino meanwhile refused to say whether the club would delve into the January transfer market to solve any of their problems.
“I am clear with you. I don’t say yes or no,” he said after the draw. “I don’t say we are going to sign or not sign, sell or not sell.
“It is not the moment to talk, when the time arrives we are going to take that decision in one way or another.
“Now is the time to stay all together, all of the squad, with the staff and the fans and try and change the atmosphere.
“We are not going to get any benefit to talk about January, it is too far away, we have got a lot of games to play.
“That is the structure of the club that is working and thinking and they need to be ready if we need to do something, if not we keep going, but I am happy with the squad, I am happy with the players.
“Like always, what is going to happen in January I cannot guess today, what happens will happen.”