Green, who lost full playing rights in Europe at the end of 2016, is making just his fifth start of the season but brings good form to the Hills GC in Gothenberg after a top 15 result in Fiji.
Six birdies against a lone bogey saw the 47-year-old sign for a 65 to be in a share of fourth, three behind leader Clement Sordet of France who was bogey free in an opening 62.
Another tournament invite, Lucas Herbert, is a shot behind Green after racing to the turn with four straight birdies, an even par inward half good enough to see the Victorian T8.
Out in just the third group of the day Sordet set the pace early and was never headed. His 8-under total was good for a two-shot lead over Scotland’s Scott Jamieson and England’s Lee Slattery with three players alongside Green at 5-under.
“I played really well,” Sordet told the European Tour website.
“I've not been playing great the past few weeks so it feels really good to start with an eight under this week. The game feels really nice and I'm really looking forward to this week.
“I hit some really good shots. I birdied the first and then I hit it close on the next three holes, so that helps.
“I wasn't really focusing on the score, I was just enjoying it. I know I'm playing really well right now so we'll see at the end of the week.”
Of the seven Australians in the field South Australia’s Adam Bland is the only other under par.
Bland fired a 3-under 67, including three birdies in his last seven holes, to stay in touch with the leaders and share 16th position.
Canberra’s Matt Millar is even par and T53 while Jason Scrivener battled to a 1-over 71 and T79.
Brett Rumford will need something special Friday to make the cut after an opening 76 left him outside the top 100 while little known Danny List is near the tail of the field at 8-over.
GEORGIA HALL'S NO TAKEAWAY PUTTING DRILL:
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