Mistakes cost us at West Ham, says unhappy Lampard

Premier League - West Ham United v Chelsea - London Stadium, London, Britain - July 1, 2020 Chelsea manager Frank Lampard reacts, as play resumes behind closed doors following the outbreak of the coronavirus disease (COVID-19) Michael Regan/Pool via REUTERS

LONDON (Reuters) - Chelsea manager Frank Lampard blamed his side's lack of attention to detail for a surprise 3-2 defeat at Premier league relegation battlers West Ham United on Wednesday.

Lampard's side dominated for long periods but were stunned late on when Andriy Yarmolenko slotted home an 89th-minute winner following a counter-attack by the home side.