Philadelphia 76ers head coach Doc Rivers is not sure if wantaway All-Star Ben Simmons will play for the NBA franchise after his surprise return.

Simmons has sought a trade from the 76ers and had been willing to sit out the entire 2021-22 season before showing up at Wells Fargo Center shortly before tip-off ahead of Monday's preseason game against rivals the Brooklyn Nets.

Reports claim Simmons had not spoken directly to team officials since late August, having missed all of training camp and preseason following a disappointing Eastern Conference semi-final loss to the Atlanta Hawks last season.

Doubts remain over the disgruntled Australian and Rivers was ambiguous regarding Simmons' playing status for the championship hopefuls.

"I don't know. He's voiced that, but we'll see how that works out," Rivers told reporters when asked about Simmons' trade status on Wednesday.

Simmons has reportedly generated interest from the likes of the Minnesota Timberwolves, Indiana Pacers, Golden State Warriors, Houston Rockets, Portland Trail Blazers and Cleveland Cavaliers but the 76ers are believed to have set a high price.

It comes after Simmons was heavily scrutinised following Philadelphia's shock playoff elimination at the hands of the Hawks in 2020-21.

A three-time All-Star and elite defender, Simmons and his shooting problems were laid bare during the 2021 postseason with the top-seeded 76ers.

Former number one draft pick Simmons had no fourth-quarter field-goal attempts in his last four games of the playoffs last season. He is the only NBA player in the last 20 seasons to have four consecutive postseason games with no field-goal attempts in the fourth quarter during a season in which he was an All-Star, according to Stats Perform.

"I'm assuming he's going to play, but who knows? I can't get in anyone's head," Rivers said with the 76ers due to meet the Detroit Pistons on Friday before opening their regular-season campaign against the New Orleans Pelicans on October 20.

Rivers added: "Whether we play him or not, that's going to depend on what we see this week.

"He's coming from behind, because he hasn't been in camp, obviously. Having said that, do you rush him and put him on the floor? That's a whole other subject.

"What we see this week is how we determine everything going forward."

Simmons averaged just 10.1 field-goal attempts in 2020-21 – a career low, which dropped to 7.9 in the playoffs. It was the same story with his scoring as it dropped to a career-worst 14.3 points per game and 11.9 in the postseason – both career lows.

Then there is Simmons and free throws. He was exposed by rival teams as they regularly sent him to the line, with the Melbourne-born guard making just 25 of 73 shots in the 2020-21 playoffs. His 34.2 free-throw percentage is the lowest ever in a single postseason.

Sixers team-mate Danny Green said: "We want him back. We want him with us. When he's in the building, we'll acclimate him appropriately. We just want everybody to come here, show up and do their part, do their jobs."

"I'll be able to see when he steps on the floor where his head's at. I don't feel like he needs to explain anything to me," added Seth Curry.