By Simon Mullock Manchester City’s bid to secure Erling Haaland to a new contract has been boosted by Real Madrid’s pursuit of Kylian Mbappe. The Premier League champions are trying to secure the Norwegian goal machine to a new deal that will keep him at the Etihad until 2029 and want to renegotiate the buy-out clause that will kick in at £171million this summer. Madrid tried to buy Haaland when the striker was weighing up his future at Borussia Dortmund – but the presence of Karim Benzema at the Bernabeu prompted him to give City the go-ahead to trigger his £51million buy-out in the summer of…