[6] In just his third first-class cricket match, while still a student at Whitgift School, he scored a double century against Yorkshire aged 18 years and 21 days.

[8] In August 2017, Sibley turned down an offer of a new three-year contract with Surrey to join Warwickshire ahead of the 2018 season.

[12] Early in his Test career it was recognised that Sibley, nicknamed “the Fridge”, had emerged from county cricket not fit enough for the rigours of the five day game, which he was addressing.

[15] On 29 May 2020, Sibley was named in a 55-man group of players to begin training ahead of international fixtures starting in England following the COVID-19 pandemic.

[16][17] On 17 June 2020, Sibley was included in England's 30-man squad to start training behind closed doors for the Test series against the West Indies.