Johnson wins WGC-Mexico Championship

Twitter / @PGATour

Dustin Johnson has won the WGC-Mexico Championship.

He finished five shots clear of two-time Omega Dubai Desert Classic champion Rory McIlroy.

The win gives the American his 20th PGA Tour title.

Meanwhile Ian Poulter, Paul Casey and Kiradech Aphibarnrat finished 10 shots behind Johnson to secure a tie for third.  

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