SIMON GUSTAFSSON'S place in the Swindon Robins side has come under threat after another disappointing night for the Swede at King's Lynn.
Sky Sports Elite League
King's Lynn 48
Swindon Robins 42
Gustafsson contributed just four points as the Robins squandered a 28-20 lead to eventually go down by 48-42.
Team boss Rossiter said: "I've got mixed feelings because we could and should have won the meeting, but I'd have taken a point beforehand.
"Simon Gustafsson has to take a long, hard look at himself because his performance wasn't good enough and we can't allow that to continue.
"We started well but some riders just faded away which was disappointing, we have to stop throwing points away."
Rossiter has shown he is not prepared to tolerate under-achieving riders having already axed Nicolai Klindt and Dan Greenwood.
The Robins were once again in a great position to claim an away win at King's Lynn but they failed to see the job through.
With Dakota North and Nick Morris claiming a 5-1 in Heat 8, Rossiter's side were 28-20 up.
But the Stars chipped away and pulled themselves back into the meeting to put pressure on the Robins.
And when Peter Kildemand slipped on the first turn of a vital Heat 13 it allowed Lynn duo Niels-Kristian Iversen and super guest Scott Nicholls to claim a 5-1 to hand them the lead.
Going into the last race Swindon needed a 3-3 to claim a point and they did that when Kildemand recovered from an early mistake to join partner Troy Batchelor by passing Nicholls.
World No.3 Iversen was unstoppable with a 15-point maximum for the home team – Batchelor won his opening two races in his nine-point score for the Robins.
KING’S LYNN: Niels-Kristian Iversen 15, Lewis Kerr 13, Nicklas Porsing 7, Scott Nicholls 6+2, Rory Schlein 4+1, Robert Lambert 2+1, Lewis Rose 1.
SWINDON: Troy Batchelor 9, Peter Kildemand 8+2, Dakota North 8+1, Nick Morris 7+2, Steve Worrall 5+1, Simon Gustafsson 4, Nathan Greaves 2+2.