Wasilewski made his Premier League debut on 1 November 2014, in the 0–1 defeat against West Bromwich Albion, during which he appeared to elbow opposing striker Saido Berahino; however, the FA cleared the defender. On 31 January 2015, Wasilewski scored his first goal in English football, heading in a late consolation goal in Leicester's 3–1 defeat by Manchester United which was also the second goal ever scored in the Premier League by a Polish footballer; Robert Warzycha had scored in the competition's opening weekend, 22-and-a-half years earlier. On 4 June, Wasilewski announced via his Instagram account that he had signed a new one-year contract with Leicester City.