Jannik Sinner has raised concerns ahead of the final at the Six Kings Slam.

The world No. 1 earned his second win over Novak Djokovic in just five days as he beat the 24-time Major champion in Thursday’s semi-final.

Sinner will now face Carlos Alcaraz in Saturday’s final with £4.6million on the line. But the Italian may not be ready to put up a good fight.

Sinner and Djokovic battled for almost two and a half hours on Thursday night but the world No. 1 ultimately came out on top. Days after defeating the Serb in the Shanghai Masters final, Sinner was made to work as he won 6-2 6-7(0) 6-4.

Although it was only an exhibition match, Sinner and Djokovic gave it their all. The 23-year-old could be seen struggling early in the second set while the world No. 4 later received treatment from the physio.

After booking his place in the final, Sinner confirmed that both of them had been “tired” and admitted he might struggle to control himself in his next match.

“We played a final in Shanghai not too many days ago, I feel like we were both a bit tired, making a few mistakes,” the two-time Grand Slam champion said.

Jannik Sinner makes worrying remark

after Six Kings Slam win over Novak Djokovic