Borussia Dortmund are weighing up a summer bid for in-form Everton winger Kevin Mirallas, SportsDirect News understands.googletag.cmd.push(function() { googletag.display(“div-gpt-ad-1389116196215-0”); });The Belgian international has been highly impressive for the Toffees this season, scoring five goals and weighing in with five assists so far, building on a solid first season with the club last year. Dortmund are on the lookout for new attacking players ahead of next season, and have seemingly identified Mirallas as a possible option in the transfer market, with the 26-year-old likely to be keen on moving to a club that can offer Champions League football. Although Everton are not yet out of the running for a top four spot themselves this season, they look like facing a tough task, and could struggle to keep a number of their big names in the summer. With loan trio Romelu Lukaku, Gareth Barry and Gerard Delofeu also possibly leaving, and big clubs starting to circle around youngster Ross Barkley, manager Roberto Martinez will be desperate not to see another key player leave.