From 1894 , Grand Duke Sergei , who was then 25 years old , became Kschessinska 's protector .
When Nicholas II , then the Tsarevich , broke off with his mistress , the famous ballerina Mathilde Kschessinska , he asked Sergei to take care of her .
From 1894 , Sergei     , who was then 25 years old , became Mathilde Kschessinska 's protector .
When Nicholas II , then the Tsarevich , broke off with his mistress , the famous ballerina Mathilde Kschessinska , he asked Sergei to take care of her .