Ghana defender Baba Abdul-Rahman sat on the bench as Chelsea's shambolic defending continued and their terrible start to the season continued with Southampton coming from behind to record a stunning 3-1 victory at Stamford Bridge on Saturday.
Rahman, who is signed from German side Augsburg to help solve the Blues' left-back problems, watched from the bench as the Chelsea defenders capitulated.
The Ghanaian has surprisingly been kept on the bench even though it is clear he will perform better than paceless Ivanovic who has been deployed at the left-back where Rahman plays.
The Premier League champions took an early lead through Willian's free-kick. Steven Davis drove in an equaliser before Sadio Mane ran through after a defensive error to put Saints ahead.
Graziano Pelle's angled finish sealed victory for Southampton, who climb to ninth in the table.
Chelsea's fourth defeat of the season leaves them 16th.
The Blues have taken only eight points from a possible 24 this season and are only four above the relegation zone.