Southampton
Valery joined Southampton in 2015 from Rennes.[6] On 27 November 2018, Southampton boss Mark Hughes handed Valery his first team debut in an EFL Cup match against Leicester City.[7] Four days later, he made his league debut, playing the whole match in a 2–2 draw against Manchester United.[8]
On 2 March 2019, Valery scored his first Southampton goal in a 3–2 defeat away to Manchester United, opening the scoring with "an outstanding finish".[9] The week later, Valery scored again in a 2–1 win at home to Tottenham Hotspur.[10] Valery ended the season with a total of 23 appearances.[11] At the end of the season, Valery was voted as 'Saints Young Player of the Season'.[12]
Despite this, the 2019–20 season would be tough for Valery, who only made a total of 11 starts for Southampton.[11] Valery later revealed that he had glandular fever which kept him out for a significant part of the season.[13] The arrival of Kyle Walker-Peters from Tottenham Hotspur, initially on loan, made it harder for Valery to get back into the Southampton first team.[14]
On 26 January 2021, Valery made his first Premier League start of the season in Southampton's 3–1 defeat to Arsenal.[15]
Loan to Birmingham City
On 1 February 2021, Valery joined Championship club Birmingham City for the remainder of the 2020–21 season.[16] He made his debut five days later as a late substitute in a 3–2 loss away to Bournemouth,[17] and replaced Maxime Colin in the starting eleven for the next fixture, another defeat.[18] He made seven appearances (two starts) in the early part of his loan spell but had no matchday involvement after Lee Bowyer took over as head coach in mid-March.[19][20]