Guidolin took charge of his first game on 24 January 2016, an away fixture at Goodison Park which Swansea City won 2–1, recording the club's first-ever league win over Everton. On 1 May, Guidolin mathematically secured Swansea's place in the Premier League for the following season, as the club defeated Liverpool 3–1 at Liberty Stadium. On 11 May 2016, and despite intense speculation and betting that former manager Brendan Rodgers would replace him, Guidolin was invited to sign a new two-year-contract with Swansea after impressing the club's board of directors with his achievements in the late winter and spring of the 2015–16 season.