Middlesbrough have received a transfer offer from a European side for one of their senior players. The 2024 summer transfer window has been open for less than a week but Middlesbrough have already been quite active. The Championship side are looking to secure promotion to the Premier League at the third time of asking under manager, Michael Carrick. In their attempts to clinch a return to the top flight, Boro have already agreed to sign Luke Ayling on a free transfer from Leeds United after the right-back impressed on loan last term. Elsewhere, Columbus Crew midfielder Aidan Morris is on the v…