Mauricio Pochettino saw his Spurs side move to within a point of the top four – but was left sweating on a possible FA charge for Jan Vertonghen.
Two-goal Dele Alli, Harry Kane and substitute Son Heung Min scored the goals that saw the north Londoners come from behind to beat ten-man Southampton.
But TV pictures appeared to show Belgian defender Vertonghen scratch the face of Jay Rodriguez in the 17th minute.
If the FA deem the incident worthy of a charge then Vertonghen – already suspended for Sunday’s trip to Watford after picking up five bookings – could face an extended ban.
Pochettino said: “I didn’t see it. By the way, he got the the yellow card at the end and is suspended for next game. But I didn’t see it. I don’t know. “
The Spurs boss was pleased, however, with the character shown by his players after their shock early setback.
Sought-after defender Virgil van Dijk had opened the scoring for Southampton in the second minute.
Pochettino said: “I think I have talked very often about character and personality. It is always difficult, against a good team like Southampton,
it is difficult to get positive things here, to take three points at St Mary’s.
“So I think our performance was good and I am very pleased. Not only because we played well, but because of the character we showed after going 1-0 down in the first action.”
Alli hit back in the 19th minute before Kane put the north Londoners ahead seven minutes after half time. The England striker missed a penalty in the 57th minute after Alli was brought down and Nathan Redmond was sent off for fouling him.
But Kane saw the turf give way as he stepped up and his effort go over the bar. Substitute Son baled him out by hitting an 85th-minute third while Alli rounded off the scoring with the fourth.
Pochettino said: “It was an accident. He put his left foot close to the ball, the ball went up and it was unbelievable the situation. The important thing is it didn’t affect the result.”
The Argentine now believes Spurs can emulate the mid-season run which took them into title contention last season. Twelve months ago then they responded to defeat against Newcastle in mid-December by winning nine out of their subsequent ten.
Pochettino said: “Why not? It is a completely different Premier League this season. But we had a very good year for us last season, 70 points, and towards the end we were still fighting for big things.
“This is an important three points for us and now it will be tough against Watford on 1 January. But we have to be ambitious and positive.”
Southampton boss Claude Puel was fuming afterwards over referee Mike Dean’s decision to send Redmond off. He said: “This red card changed the philosophy of the game. It seemed from the bench as though it was two players fighting for the ball.”