"I want players that the desire is there to improve. The best example is PSG. They had the biggest players. They won the French league, but never in the Champions League. They went back, sold their best players and went with people that have a fire in them.
"I can only speak from my own experience. We had people that wanted to improve - Harry Kane, Sonny, Eric Dier, Wanyama. There were players that want to improve and put the team as number one."
He added: "So you might say 'Spurs need to become better so we need to pay for big players'. We don't need big players. We need players with big hearts who can improve and that's something I really want to see. The team, the club, comes number one and that's very important."