The Louis Oosthuizen show just kept on rolling after the new Open champion swapped St Andrews for Stockholm and starred again.

Not wanting to give a poor display - and fearing he might after failing to break par in the curtain-raising pro-am - Oosthuizen scored a five under 67 to share the lead after the first round of the Nordea Scandinavian Masters at Bro Hof.

The 27-year-old South African, a runaway seven-shot winner at the Home of Golf on Sunday, admits he is looking forward to going home next week, but it might be with another title under his belt.

Only Australian left-hander Richard Green and American Dustin Johnson - the player who blew the US Open with a closing 82 last month - could match his opening effort.

"I had a good sleep, but I woke up tired again and the win has definitely drained me," said Oosthuizen. "But the crowds were unbelievable, cheering me onto every green and every tee.

"I wanted to play nicely. The last thing I wanted was to put on a bad show and it was important not to think too much about next week."

Leader for the last three rounds in Scotland, the Claret Jug holder kicked off with a birdie, followed with eight pars and then came home in a superb 32.

That even included a trip to the water - there is plenty of it at the spectacular new European Tour course - on the long 13th, but he came back from a six there with birdies at the next two and finished in style with a 30-footer for another.

Johnson was three ahead of Graeme McDowell with a round to go at Pebble Beach, but a dream day for the Northern Irishman was a nightmare one for the 26-year-old.

He triple-bogeyed the second hole, doubled the third and in the end finished only eighth.

Last week was an eventful one for Johnson too. If he had repeated the birdie-birdie finish to his third round on Sunday he would have tied Lee Westwood for second place.

Instead he took a double bogey six on the Road Hole 17th, then missed the widest fairway in golf on the last and went out of bounds.

That dropped him all the way to 14th, but he remains on course for a Ryder Cup debut in October.

This week cannot help that because only US Tour events carry points for the Americans, but he said: "I hit the ball beautifully all day and was never in trouble at any point."

Green, seeking his third European Tour title, made up for two bogeys with no fewer than seven birdies after changing to a driver brought out to him by a friend.

Among those only a shot behind are Korean KJ Choi and Scottish Open champion Edoardo Molinari, who with a top two finish on Sunday could climb into an automatic qualifying spot on Europe's Cup table.

That depends on what Luke Donald does 4,000 miles away at the Canadian Open in Toronto. In danger of falling out of the top nine, Donald had an opening 69, but that was four off the early lead there.

Former Ryder Cup ace Jesper Parnevik, back in action from a career-threatening fractured vertebrae in February, handed in a 75.

"Better than I thought it would be," said the Swede, who hit his first shots for five months only on Monday.

Collated first-round scores (Gbr & Irl unless stated, par 72):

67 Dustin Johnson (USA), Richard Green (Aus), Louis Oosthuizen (Rsa)

68 K J Choi (Kor), Steven Jeppesen (Swe), Rafael Echenique (Arg), Edoardo Molinari (Ita)

69 Gary Boyd, David Dixon, Niclas Fasth (Swe), Julien Guerrier (Fra), Steven O'Hara

70 Patrik Sjoland (Swe), Phillip Price, Scott Drummond, Pelle Edberg (Swe), Sam Hutsby, Richard S Johnson (Swe), Marco Ruiz (Par), Sam Little, Michael Hoey

71 Robert Jan Derksen (Ned), Andrew Tampion (Aus), Seung-yul Noh (Kor), Fredrik Henge (Swe), Peter Hedblom (Swe), Christian Nilsson (Swe), Rory Sabbatini (Rsa), Shiv Kapur (Ind), David Howell, Shiv Shankar Prasad Chowrasia (Ind), George Coetzee (Rsa), Marius Thorp (Nor), James Morrison, Brett Rumford (Aus), Jean-Francois Lucquin (Fra), Fredrik Andersson Hed (Swe)

72 Sion E Bebb, Danny Willett, Oliver Fisher, Jose-Filipe Lima (Por), Peter Hanson (Swe), Anthony Wall, Robert Rock, Chapchai Nirat (Tha), Pablo Martin (Spa), Richard Bland, Hennie Otto (Rsa), Jeppe Huldahl (Den), Mark Tullo (Chi), Magnus A Carlsson (Swe), Richard McEvoy, Andrew Dodt (Aus), Carlos Rodiles (Spa), Raphael Jacquelin (Fra), Ricardo Gonzalez (Arg), David Drysdale, Gary Murphy, Stephan Gross Jnr (Ger), Fabrizio Zanotti (Par), Jamie Donaldson, Gregory Bourdy (Fra), Nils Floren (Swe)

73 Mikael Lundberg (Swe), Damien McGrane, Joost Luiten (Ned), Johan Edfors (Swe), Robert Karlsson (Swe), Joel Sjoholm (Swe), Scott Hend (Aus), Stephen Dodd, Alexander Noren (Swe), Michael Jonzon (Swe), Wilhelm Schauman (Swe), Miles Tunnicliff, Simon Thornton, Rafael Cabrera Bello (Spa), Rickie Fowler (USA), Jean-Baptiste Gonnet (Fra), Christian Cevaer (Fra), Michael Lorenzo-Vera (Fra), Nicolas Colsaerts (Bel), Nick Dougherty, Scott Strange (Aus), Maarten Lafeber (Ned), David Lynn, Mark Brown (Nzl), Victor Dubuisson (Fra), Paul Broadhurst, Ariel Canete (Arg), Mark Foster, Troy Matteson (USA)

74 Joakim Haeggman (Swe), Henrik Nystrom (Swe), Jesper Kennegard (Swe), Jeff Karlsson (Swe), Julien Quesne (Fra), Peter Lawrie, Rikard Karlberg (Swe), Kenneth Ferrie, Anthony Kang (USA), Jamie Elson, Robert Coles, Andrew McArthur, Phillip Archer, Peter O'Malley (Aus)

75 Chris Gane, Martin Erlandsson (Swe), Ake Nilsson (Rsa), Graeme Storm, Pablo Larrazabal (Spa), Anders Sjostrand (Swe), Markus Brier (Aut), Oskar Henningsson (Swe), Jesper Parnevik (Swe), Fredrik Ohlsson (Swe), Martin Wiegele (Aut), Steve Webster, Henrik Norlander (Swe), Peter Whiteford, Jarmo Sandelin (Swe), Gary Clark, Michiel Bothma (Rsa), James Ruth

76 Soren Kjeldsen (Den), Richie Ramsay, Mikko Ilonen (Fin), Francois Delamontagne (Fra), Klas Eriksson (Swe), David Lingmerth (Swe), Clodomiro Carranza (Arg), Jose Manuel Lara (Spa), Richard Finch, Alastair Forsyth, Benjamin Hebert (Fra)

77 Daniel Vancsik (Arg), Liam Bond, Paul Waring, James Kamte (Rsa), Marcus Palm (Swe)

78 Pontus Widegren (Swe), Gary Lockerbie, Felipe Aguilar (Chi), Marc Warren, Eirik Tage Johansen (Nor), Rick Kulacz (Aus)

79 John Parry, Andrew Butterfield, Mark F Haastrup (Den)

80 Anton Haig (Rsa), Victor Tarnstrom (Swe), Peter Baker

81 Roope Kakko (Fin), Carl Suneson (Spa), Michael Campbell (Nzl)

RTD: Jyoti Randhawa