The triple world champion scored 20 points out of a possible 21 after topping the rostrum ahead of Great Britain’s world championship leader Tai Woffinden, and Danish internationals Peter Kildemand and fellow three-time champion Nicki Pedersen.
The American’s victory at Krsko, his first of the season, took him up to second in the standings on 102 points, 25 short of leader Woffinden, who scored 18 points to move on to 127 overall.
Greg said: “The only thing I could wish for right now is to be giving Tai a bit more of a run for his money.
“I had big hopes of retaining the title and doing it all again, but I missed out in a few crucial rounds, where it didn’t go as well as I had hoped.
“Gold is what we are chasing, but it’s going to be very, very tough.
“A lot of people would just take their hat off to Tai now and say ‘thank you and congratulations.’ But I’m an optimistic sort of guy. I won’t give up until there is no chance. Right now, there is still a chance.
“He’s a quick guy and you can see he’s riding with a ton of confidence. It’s hard to beat him.
“But I’m sure Tai doesn’t take anything for granted. He’s still working hard and knows there are three rounds left; anything can happen.”
The TEGERA® Stockholm SGP takes place on September 26 at the Friends Arena.
Greg said: “I have never won a round in Sweden and I have always wanted to.
“It’s a great country and I have a lot of history, family and sponsors there. There are a lot of great people there, who have taken me to another level going back over the last 10 or 15 years.
“I owe those guys a lot and nothing would feel better than to stand on top of the podium at the Friends Arena.”
Fellow NGK-sponsored rider Chris Holder is currently in sixth place in the championship on 78 points.
NGK Spark Plugs (UK) Ltd has sponsored Greg for a number of years; supplying its specialist Iridium racing plugs which he uses on his 500cc motorcycles.
The supplier of original-equipment (OE) spark plugs, glow plugs and NTK sensors continues to set the pace 40 years after being incorporated as a UK subsidiary of Japan and recently introduced a new range of NTK exhaust gas temperature sensors (EGTS) and expanded its ignition coils range.
For more information on NGK Spark Plugs (UK) Ltd and its products and services, click ‘More Details’ below and visit its new blogzine at ngktorque.com.