Jordan Spieth makes big statement with 65 at Royal Birkdale

American takes the clubhouse lead after brilliant opening round at British Open

Jordan Spieth made a huge statement on the opening day of the British Open as he shot a stunning 65 to take the clubhouse lead on five under par.

Former world number one and double-Major champion Spieth came to Royal Birkdale flying under the radar - but he is now the man to beat after an impressive showing on Thursday.

23-year-old Spieth didn't drop a single shot during a his first round - with five birdies giving him a two shot advantage over Ian Poulter, Justin Thomas and US Open champion Brooks Koepka.

It could have been even better for Spieth, who saw a birdie attempt on the 18th slide by the cup.

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Elsewhere the Irish contingent on course were treading water, with Shane Lowry one over par through 15.

Padraig Harrington meanwhile, who came to Birkdale in good form after a decent showing in last weekend's Scottish Open, could only manage a three over par 73.

More to follow.