Alonso is without a goal or an assist in his last four Gameweeks and, while he has two clean sheets over that spell, is suffering sales.
He is still owned by more than a million managers, but 56,000+ have moved him out since Saturday.
It means he is the most-sold defender in the game.
Over 18,000 of those have swapped in team-mate Cesar Azpilicueta (£6.5m).
He picked up his third and fourth assists of the season on Saturday.
All four have been passes made to Morata, making them the most profitable partnership in FPL.
Part 1: Morata creates FPL problem
Part 2: Budget forwards make their case
Part 3: Man City's midfield puzzle