Manchester City are likely to launch a bid for Tottenham Hotspur defender Jan Vertonghen if they fail to lure Porto’s Eliaquim Mangala to the Etihad Stadium, [football] direct news understands. The 26-year-old has been on the Blues’ radar since his days with Dutch giants Ajax, but they are set to firm up their interest this summer if first-choice target Mangala opts to remain in Portugal or move elsewhere.googletag.cmd.push(function() { googletag.display(“div-gpt-ad-1389116196215-0”); });A source close to the title challengers told FDN the club scouts are encouraged by the fact that the player has a good understanding with Belgium international team-mate Vincent Kompany, City’s influential skipper. With defender Joleon Lescott yet to extend his contract and looking destined for the exit door and Martin Demichelis producing some unsure performances at the heart of the backline, a new centre-half is the top summer transfer window priority. Spurs may struggle to hold onto Vertonghen if they fail to qualify for the Champions League, while City are aware that they are unlikely to be alone in their pursuit of the player.