Middlesbrough goalkeeper Seny Dieng is a man in demand ahead of the summer. Dieng, 29, only joined Middlesbrough from QPR last summer. But already he could be on the move again. The Senegalese international has featured 31 times in the Championship this season, keeping 10 clean sheets and conceding 40 goals. He’s had mixed reviews at times, but on the whole he’s proved to be a good signing for Michael Carrick‘s side. And his solid form has captured the interest of other teams, with recent reports revealing that Newcastle United and Sevilla are interested in Dieng, among other teams. Michael Ca…