Tyrone could be minus the services of as many as four key players for Sunday week's Ulster SFC quarter-final against Derry.

The Irish News reports that Tiernan McCann and Conor Meyler are both struggling with hamstring problems at present and could miss the Celtic Park clash, having sat out league games for their cubs at the weekend.

McCann has been in tremendous form for the Red Hands this season, picking up the 'Man of the Match' award in last month's Division Two final victory over Cavan, while Meyler made his return from injury in the same game as a substitute, but has since suffered a recurrence.

Veteran defender Justin McMahon and fellow clubman Conor Clarke are also racing to be fit for the battle with the Oak Leafers after picking up knocks whilst on duty for Omagh at the weekend.

There is some good news for manager Mickey Harte in that Darren McCurry and Ronan McNabb both recently returned to actions with their respective clubs.

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