The North London club were beaten 3-2 at home by rivals Arsenal in the Premier League on Sunday.
Spurs defender Van de Ven said: Of course you cannot concede three goals in the first half if you want to be a top team. It's true that you cannot concede three goals at home if you want to be a top team and we have to work on it.
The first half was not good from us, 3-0 it can't happen in your own stadium in a big game like this and I think the second half we played really well, we pressed up high and we controlled the game but in the end it was not enough.
I don't think in the football part we are worse than Arsenal. I wouldn't say we have that problem. The mentality from them is strong but I wouldn't say that either. But you see their goals and they were ruthless, they took every chance that they had and I think that makes the difference.
The first half was not good enough. Arsenal sat back deep, but when they countered they were ruthless, they scored almost every chance they had. I think that was missing from our first half in our group. It's going to be difficult to qualify for the Champions League, of course but we have to show our best in the last couple of games in the season and see where it's going to end."