Manchester City have some of the best academy facilities anywhere in the world and have played in each of the last three FA Youth Cup finals. But competition for places at senior level is tough and many find it impossible to break through.
These six players had to look elsewhere for first team opportunities but are now making a name for themselves away from the Etihad Stadium.
6. Ben Mee
With Burnley on course for their highest league finish for over 40 years this season, Ben Mee has emerged as a top Premier League centre back, even leading some to call for him to be selected by England alongside Clarets defensive partner James Tarkowski.
Mee has been with Burnley since 2011 when he joined, initially on loan, from City. His career in Manchester had seen him captain an FA Youth Cup winning side in 2008, but he had to look for senior opportunities elsewhere after failing to crack the first team.
5. Karim Rekik
Netherlands international Karim Rekik is another defender who has made his name elsewhere after spending time with City as a youngster.
Rekik joined the City academy from Feyenoord as a 16-year-old in 2011 and spent a total of four years with the club. Most of that time was taken up by loans to Portsmouth, Blackburn and PSV Eindhoven, but he joined Marseille in 2015 and is now a regular at Hertha Berlin.
4. Kieran Trippier
Like former Burnley team mate Mee, Kieran Trippier was a member of City's 2008 FA Youth Cup winning squad, but failed to make the grade at senior level. He had joined the club even earlier than Mee, first arriving when he was just nine-years-old.
The right back got his break at Turf Moor, catching the eye in the Premier League during the 2014/15 season and subsequently joining Tottenham. Trippier is renowned for his superb crossing ability and made his England debut in 2017.
3. Loris Karius
Speculation persists as to whether he will remain Liverpool number one beyond the summer, but Loris Karius has at least given manager Jurgen Klopp reason to believe he might still be the long-term option between the sticks.
The Reds are not the German goalkeeper's first English club, having spent two years at City between the ages of 16 and 18. He returned home, initially on loan, in 2011 to sign with Mainz and it was his form with them in the Bundesliga that prompted Liverpool to take interest.
2. Denis Suarez
Denis Suarez is still a fringe player at Barcelona after injury has disrupted his season, but he wears the number six shirt made famous by Camp Nou legend Xavi and will end the 2017/18 campaign with his first La Liga title.
City had signed a 17-year-old Suarez from Celta Vigo's academy in 2011 and he even played twice for the first team in domestic cup games. But City sold the midfielder to Barça in 2013, and he later returned to Camp Nou in 2016 on a buyback clause after impressing at Villarreal.
1. Rony Lopes
Brazilian-born Portuguese winger Rony Lopes is still City's youngest ever goalscorer after finding the net in an FA Cup clash with Watford in 2013 on his senior debut at the age of 17 years and 9 days, but he played just four more times for the first team before moving on.
Lopes was snapped up by Monaco for £9m in the summer of 2015 and cut his teeth at senior level during three seasons on loan at Lille. Now 22, he's established himself at Monaco in 2017/18 and has scored 12 goals in Ligue 1 from his role wide on the right.