David Luiz has been hard at work in the gym as he looks to force his way back into Chelsea's starting XI after he eventually recovers from his knee injury.
The Brazilian centre back posted a short video on his Instagram story on Wednesday of himself running on an anti-gravity treadmill at Chelsea's Cobham training base.
And the intense exercise clearly took it out of the 30-year-old after he posted a selfie of himself laying down sweating.
Luiz is desperate to return to action quickly after being usurped in the heart of the Chelsea defence by 21-year-old Andreas Christensen.