Flawless Scottie Scheffler leads at The Open but Rory McIlroy threat remains

On the charge: Scottie Scheffler - (Getty Images)

Relentless Scottie Scheffler kept his head as others around him were losing theirs, but while his main rivals fell away, the spectre of Rory McIlroy loomed in the distance.

However, the Northern Irishman's six-shot deficit may be too far back even for someone who completed the career Grand Slam at the Masters earlier this year, considering the quality of his quarry.