Eliaquim Mangala has rejected the chance to join Manchester City after the club made a £38m bid, reports Le 10 Sport.
The French defender has been in sensational form for Porto this season, drawing the interest of a number of Premier League clubs including Chelsea and Manchester United.
However, it was Manuel Pellegrini at Manchester City who acted first, launching a stunning £38m bid in order to secure Mangala's signature in the January transfer window.
After Porto accepted the bid, it looked as though Pellegrini had his man, but the 22-year-old has rejected the chance to move to the Etihad and now looks set to stay in Portugal until at least the end of the season.
Mangala is unwilling to move countries six months before the World Cup, instead opting to continue at Porto and try to make France's 23-man squad that will be heading to Brazil in June.
It's a massive boost for City's rivals Manchester United and Chelsea, who are both equally keen to add to their defence and see Mangala as a long-term solution.
David Moyes knows he needs a replacement for Nemanja Vidic, who looks likely to depart Old Trafford in the summer while Jose Mourinho fails to be convinced by David Luiz at Stamford Bridge.
But Manchester City are not out of the race as Mangala is still expected to leave Porto in the near future, possibly in the summer. Pellegrini may, however, have to turn his attentions towards other targets available this month; especially if Joleon Lescott departs the Etihad this month.