Tottenham midfielder Tanguy Ndombele launched a bottle in anger after a crunching challenge from his teammate Eric Dier.
The French midfielder took exception to Dier's lunge, which took place during an open training session at the new Tottenham Hotspur Stadium.
The spat, captured by Football.London journalist Alasdair Gold, was watched by fans who were sitting in attendance.
There was no lasting issue between the pair, who were seen sitting together and shaking hands soon after.
The club's faithful were in attendance to give them a glimpse of new Spurs boss Nuno Espirito Santo for the first time, as he oversaw the session.
Ndombele's future in North London is up in the air following a turbulent two years since his arrival in a £55m deal from Lyon.
The 25-year-old, who scored on his debut, has shown glimpses of genius, including an outrageous goal against Sheffield United last season.
But unfortunately for Spurs, those flashes haven't occurred often enough.
The Frenchman appeared to be out of favour under previous boss Jose Mourinho for the vast majority of Mourinho's rein.
The Portuguese boss aimed a dig at the midfield ace back in April following Spurs 2-2 draw with Newcastle.
Mourinho told Canal Plus: "Tanguy, I have to be honest, Tanguy is the kind of guy that you always expect more from than what he gives me. Because he is so talented, that you always expect more, more. Because the talent is amazing.
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Image:Alasdair Gold Twitter)
"I think by the talent point of view, by the creation in midfield, by the vision, he is second to nobody in this moment in European football.
"But the feeling is that he always has more to give, he never reaches the limit of the effort, the sacrifice, even the ambition.
"So he is the guy I love him as a player, but he frustrates me a little bit, because I think he can be much better than what he is."
Ndombele was signed by Mourinho's predecessor, Mauricio Pochettino before his shock departure from North London.
But the appointment of Nuno represents a clean slate for the ex-Lyon man, who will be keen to stake a claim for regular football under the new regime.
Meanwhile, Nuno is still battling to bolster his squad ahead of the new season.
Spurs long-running pursuit of Atalanta centre-half Cristiano Romero is still rumbling on, with the two sides struggling to agree on a fee.
Spurs director of football, Fabio Paratici, was part of the deal to bring Romero to Juventus from Genoa when he was at the club back in 2019.
It's hoped that this previous role in transferring Romero can play a part in getting Nuno his primary transfer target.
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