Mario Pasalic has become the 25th Chelsea player to be loaned out this summer.
The Croatian midfielder signed a new four-year deal before heading to Russian outfit Spartak Moscow on loan for the 2017-18 campaign.
Pasalic, who played against Arsenal, Bayern Munich and Inter Milan during Chelsea's pre-season tour of Asia, will be able to experience Champions League football as Russian champions Spartak Moscow have qualified for the group stage.
The 22-year-old, who has been capped twice by Croatia, is yet to play a competitive game for Chelsea.