Under-fire Manchester United manager David Moyes has identified Tottenham Hotspur defender Vlad Chiriches as the man to bolster his backline, [football] direct news understands. A source close to the champions told FDN that the club will spend a significant sum of money this summer to overhaul an under-performing squad, with the heart of the defence pinpointed as an area in need of urgent attention.googletag.cmd.push(function() { googletag.display(“div-gpt-ad-1389116196215-0”); });The source said Chiriches, who joined Spurs from Steaua Bucharest in an 8.5million move seven months ago, has impressed Moyes. The towering centre-half earned man of the match plaudits in his side’s 1-0 win at Old Trafford last month. United defender Nemanja Vidic has already confirmed his intention to leave on a free transfer at the end of the current campaign, with a switch to Inter Milan believed to be close. Fellow stopper Rio Ferdinand is also widely expected to head for the exit door when his contract expires in June.