The most detail-oriented manager in the world has found himself multiple times on the wrong side of Champions League results that have come down to the fine margins, and he's again left looking for his first final since 2011.
Tottenham and Manchester City combined for seven goals, but it was one controversially disallowed in stoppage time that produced the difference, sending Spurs to the semifinals and Pep Guardiola's side tumbling out of the competition.
Manchester United's problems go well beyond the manager's dugout, and while Ole Gunnar Solskjaer has rejuvenated the club, its current slump could result in another year on the outside of the Champions League picture.
Ajax's Champions League dream remains alive after a second straight stunning second-leg performance, while a Messi-led Barcelona recovered from an early wobble to thrash Man United and reach the semifinals.
Juventus and PSG will win their league titles yet again, completing another pair of untroubled romps to trophies that appear to be less and less meaningful by the year and amplifying the divide between Europe's richest clubs and the also-rans.