Legia Warsaw scored in stoppage time to beat Spartak Moscow 1-0 in the opening game of this season's Europa League group stage on Wednesday.
Spartak created far more chances than the Polish visitors but couldn't solve Legia's 41-year-old goalkeeper Artur Boruc.
Legia took full advantage to snatch three points with a 91st-minute goal from substitute Lirim Kastrati off a cross from Ernest Muci.
Leicester and Napoli round out Group C and play Thursday.
Legia and Spartak played a day ahead of the week's other Europa League games to avoid a clash with Spartak's cross-city rival Lokomotiv Moscow, which hosts Marseille on Thursday.