Tottenham manager Tim Sherwood accused counterpart Jorge Jesus of lacking class after his Benfica side claimed a comfortable win at White Hart Lane.
Benfica impressed in north London as they won the Europa League last-16 first-leg tie 3-1, with a Luisao brace complementing Rodrigo's first-half strike, rendering Christian Eriksen's superb free-kick a mere consolation.
While impressed by a Benfica side now unbeaten in 24 matches, Sherwood was far from happy with their coach Jesus.
The pair argued throughout the match and the Portuguese showed three fingers to Sherwood after Luisao made it 3-1, antagonising the Spurs boss at the end of a match in which they did not shake hands.
"I thought his team were very good and showed a lot of class - it's just a shame he didn't," Sherwood said.
"In the first two minutes he was coming over to the fourth official saying I was stepping in his box.
"He doesn't mind himself, does he, to be fair? Waving goodbye like that [with three fingers]? It lacks class. Why would anyone do that?
"He's got a good side, of course he has, but, nah, not for me thank you. I have no intention of speaking to him."
Sherwood was clearly furious but Jesus downplayed the incident, insisting the three-fingered gesture referred to the goalscorer Luisao - despite the fact the Brazilian wears number four.
"I was saying: 'number three, Luisao, number three," he said. "Maybe here in England the benches are too close together, compared to in Portugal.
"In Portugal, we have more space apart and we can demonstrate ourselves in our own way.
"When at some stage I invaded Tim Sherwood's personal space, he told me to go to mine. He did the same to me. But it was no more than that, it was quite pleasant in the end."
Jesus was not overly concerned if Sherwood had felt disrespected - "that's his own problem if he felt like that" - and insisted Spurs were by no means out of the tie heading into next week's second leg.
"It was not such an easy win, although we scored three goals and that's a big score," he said.
"We did play quite well and efficiently, we did well defensively and scored three great goals. We are at an advantage, but it's only half-time in this game.
"From previous matches, Tottenham have proved they are more dangerous playing away from home than at home."
On the second leg, Sherwood said: "We'll have a go, we'll do our best. They were better than us, weren't they? They were better than us."