Borisov said this during a communication session with Russian cosmonauts.

He asked the Russian crew to thank the American astronauts.

“They proved themselves worthy, extended a helping hand, but I hope that we can handle it ourselves,” RIA Novosti quotes him.

On December 15, Russian cosmonauts officially reported a leak from the cooling system of the Soyuz MS-22 as a result of damage to the ship's skin, as a result of which the air on board is heated. 

Later, Roskosmos specialists determined the exact location of the damage to the instrument-aggregate compartment.