Tottenham meet Nottingham Forest on Sunday with both teams hovering just above the Premier League dropzone.
Victory over Atletico Madrid midweek was a first in nine games for Spurs, though followed on from their 1-1 draw at Liverpool.
Asked about the shift, Tel said: "I think conversation in the dressing room. After every loss we just keep talking to each other and something changed. I would say we are together, we are more and more together.
"We are talking because maybe before we didn't speak enough. But now with the situation we talk more, more, more, more, more, and we are more about the details. So, you know, in football details make the difference and now I'm very happy about this difference.
"We're together. We're just a team now. A team. And I can feel it. We felt it also against Atletico. So, yeah, keep going. Of course we believe, we believe. We have to believe and we will do it. I believe we will do it.
"I trust my team-mates, I trust the manager, I trust everybody. If we stick together, if we show that we will do it together, we will do it.