Speculation around the Frenchman's future has been rumbling on for around 12 months, with a contract extension at the Camp Nou yet to be agreed between the Catalan side and the player.
The sale of Chelsea to Todd Boehly's consortium edges closer following approval from both the Premier League and the UK government, meaning Tuchel has been able to press ahead with his preparations for the upcoming transfer window.
Should a move for Dembele go through, it would see the winger and Tuchel reunited, after the pair worked together during their time at Borussia Dortmund in the 2016-17 campaign.
Dembele was then sold to Barcelona for a fee that could rise up to around €145m (£123.2m), where he has scored 32 goals in 150 appearances during an injury-disrupted five-year stay so far. body check tags ::