McIlroy was out in a three-ball with team-mates Llewellyn Matthews and Jamie Moul in Tuesday morning's practice at RCD.
BBC: McIlroy magnetism
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While McIlroy was paired with Matthews and Moul on Tuesday morning there appears little doubt that he will tee up alongside his fellow-Ulsterman Jonathan Caldwell come Saturday.
BBC: McIlroy magnetism
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At the closing hole, his 320-plus-yard tee shot was some 40 yards ahead of Matthews and Moul and one well-struck two iron later, McIlroy was on the green.