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Roy Keane has heavily criticised Lisandro Martinez after the defender publicly questioned Manchester United's ambition following their latest defeat. The legendary former captain branded his old club a circus and urged the struggling centre-back to improve his own performances before attacking others.

The early goings of the Champions League have yielded some results that offer an indication of who might contend - and who will struggle.

Gary Neville has warned that Lisandro Martinez's explosive public attack on the Manchester United hierarchy will severely damage the confidence of young defenders at the club. The club legend believes promising talents like Leny Yoro and Ayden Heaven will be left feeling anxious following the controversial outburst.

Speaking to GOAL at the Call of Duty: Modern Warfare 4 Ultimate Grudge Match, the Tottenham centre-back was forced to choose between some of football's greatest defenders.