Pep Guardiola is widely recognised as the finest manager of his generation having built some of the greatest teams of the 21st century.
His critics will argue he has always had a huge budget to spend wherever he has been, or a certain Lionel Messi to help him conquer Europe, but the Spanish manager has also developed a reputation for improving players.
His current Manchester City side contains world-beaters all over the pitch, but many of them did not arrive at the club as truly elite players.
Rodri had a shaky start to life in England, but now has a strong case for being the best holding midfielder in Europe, Manuel Akanji and Nathan Ake joined as solid squad options but played vital roles in City's Treble-winning campaign, and John Stones is now comfortable as a ball-playing midfielder having spent his entire career at centre back.
Guardiola deserves credit for his ability to push the majority of his players to new levels, but not everyone has flourished under the 52-year-old.
The City boss admitted on Tuesday that he has failed to get the best out of Kalvin Phillips since his £45m from Leeds United last year.
The England international could now get a run in the side due to Rodri being suspended for the next three matches, but it already feels like he is running out of time to turn his City career around.
Mail Sport looks back at other players that have fallen by the wayside while working with Guardiola over the years.
Zlatan Ibrahimovic's transfer to Barcelona in 2009 looked on paper like the right move at the right time.
The Swedish forward had just led Inter Milan to three successive Serie A titles, making a move to the best side in Europe at the time the logical move.
Standing at 6ft 4in with remarkable athletic ability,Read on m.allfootballapp.com