After weeks of speculation Spanish winger Sergi Canos signed for Norwich on 13th July 2016 from Liverpool in a £2.5million deal that could rise to £4.5million dependent on promotion, appearances etc.

Canós began his career in the youth system at hometown club Nules, before rejecting attention from Valencia, Villareal and Atlético Madrid to join Barcelona's La Masia academy in 2010. He left Barcelona in 2013 and signed for Liverpool. He progressed through the Under-18s to the reserves in less than one season.

On 31 August 2015, Canós joined Championship side Brentford on a loan which was later extended until the end of the 2015-16 season. He made the first senior appearance of his career as a late substitute for Philipp Hofmannin a 1–1 draw with Leeds United at Elland Road on 12 September. He finished the season with 39 league appearances and seven goals.

he made his Liverpool début on 15 May 2016 on the final day of the Premier League season. He came on as a substitute in Liverpool's 1–1 draw with West Bromwich Albion

Canos made his Norwich debut as a 60th minute substitute in the 1-0 win over Bristol City on 16th August 2016.

Having made just five first team appearances for Norwich in the first half of the season, he was linked in January with a return to Brentford whilst Bristol City and Leeds were also said to be interested, speculation linking Canos with the latter being retweeted by the player. Canos finally returned to Brentford on 31st January 2017 for a reported £2.5million, signing a four and a half year deal funded by the sale of Scott Hogan to Aston Villa. Brentford manager Dean Smith said “Sergi, is a player and character that fits naturally into our dressing room,” he told the Bees’ official site. “After working with him last season, you can see what he brings to the group, and an infectious attitude to match. We are all very happy that the deal has been completed and we can all now work together to continue his development and enjoy the potential we all know he possesses.” Canos had made 6 appearances for City, excluding the Football League Trophy, and was behind the Murphy twins in the pecking order.

Canos played an unexpectedly important role in the Canaries' promotion to the Premier League earlier in 2018/19, earning cult status among supporters for his role in denying Leeds. On Easter Monday Daniel Farke found himself having to pick up some of his disappointed players after they had sunk disappointedly to the turf after a 2-2 draw at Stoke. A second opportunity to confirm promotion had slipped past, with the Potters equalising twice to leave the eventual champions frustrated, with Sheffield United winning 3-0 at Hull to close the gap at the summit to three points. It meant that a Leeds win at Brentford in the day's late kick-off really would have tightened things up at the top, as just three points would separate first from third with two games to go. Enter Sergi.. who set up Neal Maupay for the opener and then made sure of a 2-0 win for Brentford, to leave Leeds six points adrift - and Norwich on the cusp of the Premier League.

On 31st January 2023 he was loaned to Greek side Olympiakos until the end of the 2022/23 season. Although he had played 249 games for the Bees, only six of them had been in the 2022/23 season across all competitions. Brentford director of football Phil Giles said there is still the possibility that Canos signs a new deal at the club. "We would like to wish Sergi all the best for the second half of the season. He has not played as many games this season as he would have liked, and this is a great opportunity for him. He has played an important role in our recent history and produced some very big performances in some very big games. He will always be the player who scored our first Premier League goal. He was also a key part of the team when we were making progress in the Championship. He was a young player that developed with us and excited our fans with the way he played and the goals he scored. We have the option to extend Sergi’s contract in the summer, so it is very possible that we will see him back with us."

On 21st August 2023 he signed for Valencia on a permanent deal.

Canos has been capped by Spain at Under-15, Under-16, Under-17 and Under-19 level