​Gianni Infantino was elected Fifa president in 2016 [Getty Images]A week is a long time in politics. Football politics. On Tuesday morning, Gianni Infantino was in an impregnable position as Fifa president, the most powerful job in football.Now, after trying to sell stakes in Fifa competitions to private investments firms – apparently without the knowledge of anyone else – Infantino’s position appears to be under threat. Uefa – Infantino’s fiercest critic – dealt its trump card on Thursday by threatening to boycott all Fifa competitions, including the World Cup.Now European football’s governing body senses the opportunity to remove Infantino – and this is likely to be the best chance it will ever get.But they’re far from the only unhappy federation. Concacaf, the confederation Infantino worked so closely with to organise the 2026 World Cup, has called for a “full review” into the leadership of Fifa in light of Infantino’s plan. Even more damaging, loyal countries in the Asian Football Confederation (AFC) shunned him too.Then he was abandoned by two of his closest allies – first senior adviser Carlos Cordeiro and then chief operating officer Kevin Lamour.After Infantino backtracked in the early hours of Saturday morning, Uefa delivered another devastating blow by issuing a strong statement saying it had lost confidence in him.The battles lines have been drawn. What could happen next?Uefa has ‘lost confidence’ in Infantino’s Fifa leadershipFour reasons why Fifa’s World Cup plan never stacked upInfantino on the brink? Who might replace him if he goes?How could Infantino be ousted?The quickest route for Infantino’s exit would be for the Swiss to resign, like his predecessor Sepp Blatter did in 2015. But Infantino still retains support and he could try to hold out until March, when he is up for re-election for a fourth and final term as president. What other avenues are open?The Fifa Council could try to force Infantino’s hand through an emergency meeting.Such a gathering would be triggered if 19 of the 37 Fifa Council members call for one.Uefa has nine members, AFC has seven, Concacaf five, Africa has six, Conmebol five and Oceania three. It is completed by Infantino and secretary general Mattias Grafstrom.BBC Sport understands there are some doubts that the 19 votes could be achieved. If they do get to 19, the meeting must take place within two weeks and the Fifa Council could call on Infantino to tender his resignation. But he could simply refuse to do so. It would, however, add further pressure.The next step would be an extraordinary congress of the 211 Fifa member associations, which would be held if one-fifth, or 43 associations, “make such a request in writing”.So Uefa, which has 55 nations, can trigger the extraordinary congress whenever it so wishes.That would take a minimum of two months from the point it is triggered, but more likely three months, and there is no guarantee of success.In effect, it would be a de facto election without there