The Frenchman's fifth goal in four matches sent Enzo Maresca's side on their way to another European victory.
Christopher Nkunku and Mykhailo Mudryk got the goals as Chelsea kept their perfect Conference League record intact with a 2-0 win at Heidenheim on Thursday, but it was Jadon Sancho who deserved most credit for the victory.
Sancho created both goals with excellent crosses in the second half, overcoming a quiet start to tee up Nkunku and Mudryk for fine finishes as the Blues put the first blemish on the hosts' own record in the competition.
The German side had a few chances to hurt the Blues, in part thanks to some questionable displays from the likes of Axel Disasi and Benoit Badiashile, but they came up against a superb shot stopper in Filip Jorgensen. They were also frustrated to see two goals chalked off.
Chelsea had the upper hand for the majority of the game, with Marc Guiu showing a lot of promise early on but he failed to deliver. It was left to Nkunku to break the deadlock when his outstretched leg met Sancho's cross and the forward added a composed finish.
The game appeared to be fading out when a smart combination from Sancho and Kiernan Dewsbury-Hall ended with the winger's excellent ball back to Mudryk to send it into the top corner.
GOAL rates Chelsea's players from the Voith-Arena…
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Filip Jorgensen (8/10):
Pulled off some excellent saves to keep Heidenheim at bay.
Renato Veiga (7/10):
Was aways looking to get forward to add energy to Chelsea's moves.
Benoit Badiashile (5/10):
Booked right at the beginning of a shaky display for the centre-back.
Tosin Adarabioyo (6/10):
Made some passes to help Chelsea get forward but was a bit erratic at times.
Axel Disasi (6/10):
A bit of a hectic display as he gave plenty away, but made the challenge that kickstarted the move for the goal.
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Mykhailo Mudryk (7/10):
Tried his best to create some danger but failed to connect to his team-mates a few times before a lovely finish to make it 2-0.
Cesare Casadei (6/10):
Looked uncomfortable in his role and needed more support. Ended up being sent off with a second yellow late on.
Kiernan Dewsbury-Hall (7/10):
Made some poor decision making and bad passes but had a role in the build up for both goals.
Jadon Sancho (8/10):
Kept quiet in the first half despite his efforts to get the ball forward, but got the assist for Nkunku and looked more dangerous afterwards. His excellent work created the second.
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Christopher Nkunku (7/10):
Lively throughout and was rewarded with the goal after a fantastic first touch but he should have had a second.
Marc Guiu (5/10):
Had a bright start with good runs and smart positioning, but his finishing let him down.
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Joao Felix (5/10):
Didn't have impact after replacing Guiu beyond a good pass to tee up Nkunku for a wasted effort.
Carney Chukwuemeka (5/10):
Put a good ball in but couldn't connect with a team-mate.
Samuel Rak-Sakyi (N/A):
Had no time to impact the game.
Tyrique George (N/A):
Came on in the final minutes.
Enzo Maresca (6/10):
His side got over the line but gave away too many chances and the coach will be concerned by some of his players' performances.