(b Sharpayevka farm, nr Rostov-on-Don, 15 June 1882; d Sevastopol’, 27 Nov 1934). Russian painter. He studied from 1899 to 1903 at the Odessa Art College under Kiriak Kostandi (1852–1921) and from 1903 to 1911 at the Academy of Arts, St Petersburg, under Il’ya Repin, but mainly under F. A. Frants Rubo (1856–1928), the leading Russian battle painter of the time. He adopted the name Grekov in 1911. As a soldier in World War I, he made many sketches at the front. He was an active member of the Association of Artists of Revolutionary Russia (AKhRR).