The Dubliner was sent back to the Premiership champions once it was found out that he would miss this week's game.
达夫已经返回切尔西，膝伤使得他无法参加本周对阵瑞士的一场至关重要的世界杯预选赛。
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The young Dubliner has impressed during his six-month loan stint at Hull and is due to return to United in the New Year for discussions over his next move.