Crystal Palace are waiting on a decision from Andoni Iraola regarding their head coach position, with Frank Lampard among the alternatives if he declines. The club has made a proposal to Iraola, who has been in talks with other teams. Palace believe they have done all they can to convince Iraola they can provide the platform for him to continue building his reputation. All that is left is Iraola's approval. If the 43-year-old declines then Palace will move on to plan B. Among the alternatives is understood to be Frank Lampard, who has key admirers in the Palace boardroom. Releasing Lampard from his contract with Coventry provides an obvious stumbling block should Palace pivot to the former Chelsea midfielder. But there is some optimism at Palace that Lampard, who is aware of the Eagles' interest in him, would be open to joining before next season. Kieran McKenna, Pierre Sage, Sean Dyche and Thomas Frank have also been discussed as options. Luring Iraola to Selhurst Park would represent a coup, but the fact he has taken so long to decide has led to a degree of scepticism inside Palace over whether the now-departed Bournemouth head coach is prepared to accept. Much will become clearer in the coming days. As ever, player retention will emerge as a key narrative in Palace's summer. Michael Olise, Eberechi Eze and Marc Guehi have all left the club in the past two years, but Palace are determined to avoid any further significant exits. That will be easier said than done. While Wednesday night's victory over Rayo may help keep players satisfied with Europa League football now secured for next season, their triumph will inevitably attract more admiring glances at their players. Adam Wharton's man-of-the-match performance in the final will only serve to heighten the feeling the midfielder is destined to join an elite club. Liverpool and Manchester United are known to be among his admirers. But Palace are in a strong position to keep the wolves from their door for at least one more season given Wharton's contract still has three years left to run. Palace are open to offering Wharton an improved deal, though it is unclear whether the midfielder is keen to engage given the interest from elsewhere. Elsewhere, goalkeeper Dean Henderson, who has two years on his current contract, is attracting interest from several Premier League clubs.