Danny Willett, who led last week`s British Open at the halfway point, continued that form with a one-shot lead after Friday`s weather interrupted-second round at the European Masters.
The Englishman shot a 62 to add to his opening 65 for a 13-under par total of 127.
South Korean duo Seuk-hyun Baek and 2009 USPGA champion Y.E. Yang were in a tie for second, one shot back, after matching 63s, with Swedish amateur Marcus Kinhult three shots further away.
The 27-year-old Sheffield-born Willett eventually finished sixth at St Andrews, and he is intent on improving on that at Crans-Montana.
"It was very, very good, right from the get-go," said Willett, who carded nine birdies against a single bogey.
"I`m better mentally now than I was. Over these last two weeks especially, I haven`t been getting too far ahead of myself, and every time I`ve got in trouble I`ve just taken my medicine and moved onto the next."
Yang described the conditions as "ideal".
He added: "I managed to judge the ball distance better as the ball flies ten per cent further due to the altitude -- it`s beautiful, with the mountains and scenery."
Overnight leader Gregory Havret failed to produce his opening round fireworks, adding a 69 to his 63 for a share of fifth.
Lightning forced play to be abandoned for the day with 36 players having to return early on Saturday to complete their rounds.