Tottenham Hotspur have overcome a one-goal deficit and a late-game Eric Dier toilet break to beat Chelsea on penalties, advancing to the Carabao Cup quarter-finals.
Trailing 1-0 with 15 minutes left, central-defender Dier was spotted leaving the pitch without being substituted, leaving his team short-handed.
Cameras followed the England international into the tunnel with manager Jose Mourinho close behind.
Moments later, Dier and his boss emerged from underneath Tottenham Stadium, and after the game, Mourinho confirmed Dier had a toilet emergency, before criticising the schedule of having to back up two days after their EPL clash with Newcastle United.
"What happened to Eric Dier is not normal," Mourinho says. "I have to praise him in a special way.
"It should be forbidden for a player to play two games in 48 hours at this level. What he did is not human to do.
"He had to go [when he ran off] - he had no chance.
"Maybe it is a normal thing when you are completely dehydrated, which is the case. I had to put pressure on him to get back, but he is a great example for everybody.
"If the authorities don't care about players, I care."
Spurs' 83rd-minute Eric Lamela goal forced penalties, after German star Timo Werner scored his first goal for Chelsea to open the scoring early in the first half.
Mourinho's men were perfect from the spot, converting all five penalties, before Chelsea midfielder Mason Mount shot wide to gift Spurs victory,
Of his late match adventure, Dier says he was just relieved Cheslea didn't score in the few minutes he went missing.
"After playing on Sunday it wasn't easy, maybe that's the reason I had to run off but we got through it," he says.
"All of the staff and the players put the effort in.
"Jose wasn't happy but there was nothing I could do about it, nature was calling.
"I heard there was a chance while I was off the pitch, but thankfully they didn't score."
Dier's off-field excursion wasn't quite as newsworthy as his previous misadventure earlier this year, when he was charged by the FA for leaping over advertising hoardings and racing into the stands to protect younger brother Patrick from abusive fans.