By Felix Keith Alexander Isak has insisted he is not thinking about the possibility of leaving Newcastle this summer but admitted “things can happen” following suggestions the club may be forced to sell him. Newcastle announced losses of £150million over the last two years back in January, triggering concerns they could breach the Premier League’s profit and sustainability rules. The club’s chief executive Darren Eales admitted they might trade players if “the offer is too good to refuse” or there was another incentive to do so. Isak joined Newcastle for a club-record fee of £63m from Real Soc…