According to an Ukrinform correspondent, the Ukrainian walked on the pitch in the 78th minute and scored the winner in the 89th minute.
Tomas Soucek (45+2), Michail Antonio (51) and Andriy Yarmolenko (89) scored goals for West Ham. Willian (42 (pen.), 72) scored for Chelsea.
Chelsea retain their place in the UEFA Champions League zone with 54 points. West Ham, with 30 points, remained in 16th place, which gives the club the right to play in the English Premier League next season.
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