BIRMINGHAM: Boxer Amir Khan has told Kell Brook he must wait until the end of this year and stay at welterweight to make their British blockbuster happen. Khan is not considering Brook as an opponent for his comeback fight in May but is more open to their grudge fight now than ever before. Britain’s two-time world champion and Olympic silver-medalist – in Las Vegas to support Carl Frampton in his world title rematch against Leo Santa Cruz – is ready to put an end to his long-running feud with Brook. Of his Twitter spat with Brook and his promoter Eddie Hearn over possible financial terms Khan says: ‘That got silly. We need to stop with the social media now. ‘There wasn’t even any point discussing a purse split when we haven’t agreed yet to fight.’ After eight months out of the ring recovering from complex surgery to his right hand Khan needs a warm-up fight – which he would prefer to be in England – before his next world-title shot. But he is urging Brook to resist moving up to super welterweight, saying: ‘If he does that then the chance of us fighting is finished.’ Both ventured climbing the divisions last year and both were knocked out, Khan by Canelo Alvarez and Brook by Gennady Golovkn. Khan adds: ‘For me any fight has to be at 147lbs. That makes business sense me and Kell. ‘The bigger fights and the most money are at welterweight. I will also want my second fight this year – in November – to be for a world title. ‘Kell would be better making his mandatory defence against Errol Spence this spring.’ Another option for Khan would be to fight the winner of the forthcoming welterweight title fight between his old nemesis Danny Garcia and Keith Thurman.