Luke Shaw concedes Manchester United have to be winning games against Arsenal if they are a serious about challenging for the title.
The Red Devils played out a goalless draw at the Emirates to slip further behind leaders Manchester City. United have failed to win three of their last four and were shocked by Sheffield United in midweek.
Their stalemate in north London - which Shaw labelled "unacceptable" - means they are now five points off the summit. Ole Gunnar Solskjaer's side were not expected to challenge at the top, but at the midway point of the season are in contention.
Shaw though felt as if their draw at the Gunners was a missed opportunity. He told Sky Sports : "[It's] two points dropped I feel.
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