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The Northern Irishman held a two-shot lead going into the final round, and said he had learnt lessons from his 2011 collapse, when he let a four-stroke advantage slip away.

The MCA said the vessel was the first of its kind, powered by a four-stroke engine, two of which are capable of being fuelled by ammonia and diesel.

Scheffler has already won six PGA Tour events this season but he may have saved his best round of the year for Sunday, shooting a nine-under 62 to wipe out a four-stroke deficit and beat silver medalist Tommy Fleetwood of Great Britain by a stroke with a 19-under 265.

After beginning the final round with a four-stroke lead, Riley gave up a stroke with a bogey on the second hole when he drove into the right rough and then hit into the bunker.

Then, after Stark bogeyed the par-4 16th two groups ahead, Green ran in a 25-footer for eagle from the fringe on 15 to open a four-stroke lead, and made it 5 under in five holes with a birdie on 16.