Aubameyang, 32, was stripped of the captaincy on Tuesday for a disciplinary breach, leaving Gunners' manager Mikel Arteta saying he would not be considered for selection when they take on West Ham United later on Wednesday.

Tuchel coached Aubameyang when they were at Borussia Dortmund for two seasons, the most prolific of the Gabon striker's career when he scored 79 goals.

"I will (reach out) at some point, but I don't want also to disturb. I think that he was a very important player for me, we had a very close relationship," Tuchel told reporters ahead of Chelsea's home game against Everton.

"When we meet it's still always very nice, I can only say the best things about Auba as a player and a person.

"I feel sorry for him that he's in trouble. This isn't where he should be with his kind of quality and the positive character that he has.

"But I'm not involved in what's going on in his club now... I want to also show my respect and not be involved and judge what is right and wrong."

Tuchel said midfielder N'Golo Kante would be back on the bench for Thursday's match while Trevor Chalobah is also in the squad with only Mateo Kovacic (COVID-19) and Ben Chilwell (knee injury) unavailable for selection.

After a strong start to the season, Chelsea have slipped in recent weeks, losing top spot in the standings.

Tuchel's side sit third and have not kept a clean sheet in their last five matches in all competitions.

"It shows us we were spoilt. It shows hard it is, teaches us this lesson. Maybe we over-expect clean sheets from us," Tuchel said.

"In the last three games, we've conceded eight goals and this is more concerning than having a clean sheet because to have clean sheets in the competitions we play, you need luck, an extraordinary goalkeeper, a certain momentum.

"This is what we had at the beginning of the season to escape sometimes."

Australian Associated Press