Sumarokov
Here's more complete info;
Name: Mikhail Nikolayevich
Family name: Sumarokov-Elston
Nationality: Russia
Gender:
Had: 77 years
Date of birth: January 2, 1893
Place of birth: Jalta, Russia
Date of death: July 3, 1970
Place of death: London, Great-Britain
Stats
Matches in database: 12
Victories in database: 11
Tournaments won in database: 4
Results
1920 South of France championships
Quarterfinals Sumarokov-Elston, Mikhail Nikolayevich d. Barclay, H.S.L. (Lewis) (6-3 7-5)
Semifinals Sumarokov-Elston, Mikhail Nikolayevich d. Ritchie, M. Joshia George (3-6 6-4 6-4)
Final Sumarokov-Elston, Mikhail Nikolayevich d. Gerbault, Alain J. (7-5 6-2 2-6 3-6 6-1)
--------------------------------------------------------------------------------
1921 Nice
Round 2 Sumarokov-Elston, Mikhail Nikolayevich d. Thole, J. (6-0 6-1)
Quarterfinals Sumarokov-Elston, Mikhail Nikolayevich d. Boyd, R.A. (6-1 6-0)
Semifinals Lowe, Francis Gordon d. Sumarokov-Elston, Mikhail Nikolayevich (3-6 10-8 3-6 7-5 3-0 ret.)
--------------------------------------------------------------------------------
1921 South of France championships
Final Sumarokov-Elston, Mikhail Nikolayevich d. Balbi de Robecco, Mino (6-1 6-1 6-0)
--------------------------------------------------------------------------------
1922 Nice
Quarterfinals Sumarokov-Elston, Mikhail Nikolayevich d. Hillyard, Jack M. (6-2 6-4)
Semifinals Sumarokov-Elston, Mikhail Nikolayevich d. Rocksavage, Lord (6-3 6-2)
Final Sumarokov-Elston, Mikhail Nikolayevich d. Morier, C. (6-1 6-1 6-0)
--------------------------------------------------------------------------------
1922 South of France championships
Semifinals Sumarokov-Elston, Mikhail Nikolayevich d. Aeschliman, Charles F. (6-4 6-4)
Final Sumarokov-Elston, Mikhail Nikolayevich d. Cochet, Henri Jean (6-0 6-2 7-5)
Accordingly, Russia's national championships were held in St. Petersburg as it had been the birthplace of tennis. Mikail Sumarokov dominated the men's singles with five consecutive titles up until 1914, only to be halted by World War One military service.
He competed at the Olympics 1912 too.