Alonso’s late goal seals a 2-1 win for Chelsea over Manchester City.
The hosts took the lead in the first half when Sterling fired past Mendy, but Aguero’s fluffed Panenka penalty was saved by the keeper just before the break.
Ziyech pulled Chelsea level with his low shot into the bottom corner and the visitors also had three goals ruled out for offside – two for Werner and another for Hudson-Odoi.
Nine years ago, Sergio Aguero scored one of the most famous title-winning goals in English football history. It was the Aguerooooo moment.
He had the chance to do it again on Saturday evening when he stood over the penalty that might have sealed Manchester City’s third title in four years.
This time, though, it went horribly wrong. It was his Aguero-Oh No moment.
Aguero is fast approaching the end of his brilliant career at City but his penalty attempt will not form an auspicious part of its last chapter.
With City leading 1-0 and half time imminent, he tried to trick the Chelsea goalkeeper Edouard Mendy by committing him to a dive and floating a Panenka penalty over his prone form. The only problem was Mendy was not fooled by it.
Mendy managed to check his dive and stand up, pat the ball down casually with his left hand and gather it safely.
City conceded an equaliser from Hakim Ziyech midway through the second half and then fell to a last-gasp winner from Marcos Alonso that meant City could not add to their 13 point lead over Manchester United and seal the title.
Alonso won it in stoppage time though when he drilled his effort over Ederson.
City will have their eyes on Manchester United’s game against Aston Villa tomorrow, but they will only be confirmed champions if their rivals lose.
They don’t play again until Friday when they face Newcastle United.
That win lifts Chelsea above Leicester City into third place and they have another big game in midweek as they host Arsenal.