#2 Aymeric Laporte
Aymeric Laporte essentially cost City dearly in this tie. Had he not made the two errors that led to Son Heung-Min's two goals within 10 minutes, City would have cruised to victory and progressed through to the semi-finals without much of a worry, as Spurs were poor at the back, too.
Not one, but two errors, is simply unacceptable in a fixture as important as this. Granted, it was just an off-game for the 24-year-old but it couldn't have come at a worse time.
The other centre-back with him, Vincent Kompany, wasn't much better but he remained consistent and composed throughout the match, ensuring that no more mistakes were made.
Laporte improved as the game went on but the damage had been done at that point and there was no going back. City had their work cut out after that, and things were far more difficult than they needed to be.