Rory McIlroy admits he has lots of work to do ahead of next week's US Open after missing the cut at the final event before the third major of the year.

The Northern Irishman struggled with a new driver as he crashed out of the RBC Canadian Open after shooting 78 in Friday's second round, slumping to the worst finish in his PGA Tour career.

McIlroy finished nine-over par for the tournament to finish tied for 149th place to miss his first cut of the year and first since The Open at Royal Troon last year.

McIlroy admitted he has to do a lot of practise at before heading to Oakmont for the US Open, which starts on June 12, live on Sky Sports.

"There's still learnings that you have to take from a day like today," he said. "Even though the last two days didn't go the way I wanted them to, t

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