Ahead of tonight's League One tie, we look at three players who have played for both sides, including one current Derby County defender...
Coventry City take on Bradford City tonight in Tony Mowbray's second game in charge of the Sky Blues.
Plenty of players have a history of playing for both clubs and here we take a look at three who featured for both the Bantams and the Sky Blues during their careers, with one still playing in the Championship...
Claus Bech Jorgensen
The Danish-born midfielder enjoyed spells at both Bradford City and Coventry City during his playing career.
The Bantams secured his services in 2001 and he went on to make over 50 appearances for the club, scoring 12 goals.
He also made 52 appearances for the Sky Blues and scored six goals between 2003-2006, including the first ever goal at the Ricoh Arena.
Irish centre-back Babb came through the youth ranks of Millwall, before moving to the Bantams in 1990.
But the Sky Blues came in for him in 1992, where he spent two seasons before moving to Liverpool in 1994 for £3.6million, which made him the most expensive defender in Britain at the time.
Currently at Derby County, it was loan spells at Bradford and the Sky Blues which helped to ignite his career.
He started his career at Liverpool and joing Bradford on loan in 2002, making 12 appearances, before joining the Sky Blues in 2003 temporarily, making 44 appearances.
Warnock also played for Blackburn, Aston Villa, Bolton Wanderers and Leeds United before his January move to the Rams.