Philadelphia 76ers head coach Doc Rivers said the franchise have a plan to address Ben Simmons' shooting woes as speculation over the embattled All-Star's future intensifies.

Simmons was subjected to boos after the top-seeded 76ers crashed out of the NBA playoffs in the Eastern Conference semi-finals following a shock 103-96 loss to the Atlanta Hawks in Game 7 on Sunday.

Philadelphia fans vented their frustration after Simmons attempted just four shots for five points in the series decider, while tallying 13 assists and eight rebounds against the fifth-seeded Hawks.

Simmons also passed on a wide-open dunk during the closing stages against the Hawks, instead passing to Matisse Thybulle – who was fouled and made just one of the two free throws.

Amid trade rumours after Simmons was reportedly at the centre of Philadelphia's attempts to acquire James Harden in January before the former MVP was dealt to the Brooklyn Nets by the Houston Rockets, Rivers discussed the Australian.

"I believe, without going into detail with what we're doing, I believe we know what the right work is, and the right type of work, and the right way to do it," Rivers told reporters on Monday when asked why this offseason will be different for Simmons.

"You can do the work all the time. But if it's not done in the right way and the right type of work, you may not improve.

"After being here for a year, I really do believe we've identified what and how, and now we have to do the do part.

"We have to work to do it. It's not going to be an easy job. But it's definitely a job that Ben can do."

It comes after Rivers casted doubt over Simmons' future with the 76ers following another failed run at a first NBA championship since 1983.

The debate around Simmons – an elite defender and creator – centres on his offense or lack thereof, with the 76ers often handicapped by his unwillingness to shoot.

Simmons' field-goal percentage has regressed, dropping from 58.0 in 2019-20 to 55.7 this season – he only managed worse in his 2017-18 rookie campaign (54.5).

The 24-year-old only averaged 10.1 field-goal attempts in 2020-21 – a career low, which dropped to 7.9 in the playoffs. It is the same story with his scoring as it dropped to a career low 14.3 points per game and 11.9 in the postseason – both career lows.

Asked if he thought Simmons could be a guard on a championship team, Rivers told reporters post-game: "I don't know the answer to that right now.

"I don't know. He struggled from the free throw line and that became a factor in the series. There's no doubt about that. Still believe in him.

"But, we have work to do. We're gonna have to get in the gym, put a lot of work in, and go from there."