Alexey Sergeyevich Dreev (Алексей Сергеевич Дреев, also transliterated as Aleksey or Alexei; born 30 January 1969[1]) is a Russian chess player.

[2] In the 1990–1993 world championship cycle he qualified for the Candidates Tournament at Manila 1990 Interzonal, but lost his 1991 round of sixteen match to Viswanathan Anand[2] in Madras (+1 =5 −4).

In the next four FIDE World Championship tournaments he was knocked out at the last sixteen stage: at Las Vegas 1999 by Michael Adams, at New Delhi 2000 to Veselin Topalov, at Moscow 2001 to Viswanathan Anand, and finally at Tripoli 2004 to Leinier Domínguez.

[9] In January 2016, Dreev tied with Baskaran Adhiban and Eltaj Safarli for first place in the Tata Steel Challengers Tournament in Wijk aan Zee.

[10] In 2018 Dreev won the Fall Chess Classic A tournament in St. Louis, US with a score of 6½/9, one point ahead of the nearest follower, Lázaro Bruzón.