Armenak Misakovich Alachachian (alternate spellings: Alachachyan, Alatchatchan, Alajajian) (Armenian: Արմենակ Միսակի Ալաջաջյան, December 25, 1930 – December 4, 2017) was an Armenian-Sovietbasketball player and coach. During his club playing career, the point guard reached European stardom with CSKA Moscow and the senior men's Soviet Union national team. He was the first person to ever win a EuroLeague title, as both a player and a head coach.
Aleksandar Gomelsky, who was at the time CSKA Moscow's sports director, assigned Alachachian to the club's head coach position in 1968. Alachachian would go on to lead the team to the Euroleague championship in 1969. Alachachian thus became the first person to win the title as both a player and a head coach.