Former All Blacks halfback Justin Marshall claims incoming All Black coach Scott Robertson has been barred from New Zealand's World Cup games in France.
Marshall a former All Black and Crusaders teamate of Roberton made the claim on South African television channel SuperSport.
He was part of a discussion panel which also included former Springbok Schalk Burger.
Burger added there was "no love lost" between Foster and Robertson.
"They feel he's too big a distraction to the current players. All of a sudden they might want to chat to him or might want to impress him," Marshall told SuperSport.
RNZ understands New Zealand Rugby rejects any suggestion of a ban, but is reticent to make a formal denial concerned it will only give Marshall's comments more publicity.
Robertson was appointed to take over from Foster after the World Cup back in March.
He has a four-year deal through to the end of the 2027 World Cup.
Foster didn't reapply for the job citing a "mood for change" at New Zealand Rugby.
Foster succeeded Sir Steve Hansen after the 2019 World Cup with the side winning 29 of their 42 games, with 11 losses and two draws.
- RNZ