• Scandanavian Masters, Round Two

Rampant Choi overhauls Oosthuizen in Stockholm

KJ Choi is the man to beat on day two at the Scandanavian Masters © Getty Images

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Overnight leader Louis Oosthuizen was overhauled by KJ Choi, who heads the field at nine under, on day two at the Scandanavian Masters in Stockholm.

In his first tournament after his maiden Major triumph at the Open, Oosthuizen seized a share of the first-day lead - alongside Dustin Johnson and Richard Green - by running riot on the back nine.

But Choi left him in the shade on day two as he built a two-shot lead over the South African by producing a superlative five-under 67.

Sweden's Richard S Johnson is one behind Choi after producing a flawless 66 to go storming up the leaderboard after an unremarkable first day.

After starting on the back nine, the South Korean eagled the 15th - which he had bogeyed in his first round - before picking up a stroke on each of the notoriously difficult par threes at 16 and 17.

The world No. 45 had to endure a more turbulent time after the turn as swirling wind began to upset the players' progress. Three bogeys between holes four and seven went some way to scuppering his stellar early work, but an birdie at 18 ensured that he would remain the man to beat.

Oosthuizen came storming out of the blocks with two birdies in his first three holes, but his round stalled until a late charge saw him sign for a fiercely competitive two-under 70 to share third place with Argentina's Rafa Echenique, who hit four birdies for a three-under 69.

Meanwhile Johnson, who sits five strokes back from Choi, produced a chaotic 73 - six bogeys, five birdies - that will have dampened his expectations of victory at the tournament.

Green teed off late in the day, but he found himself in the unhelpful habit of giving back birdies shortly after picking them up - he shot a 71 and sinks to three shots off the pace.

Wales' Jamie Donaldson remains in the hunt at four under, while Simon Thornton of Ireland climbed 55 places with a 67.

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