Since Chelsea sold Filipe Luis back to Atletico Madrid, they have been left with one left-back. Even then, Cesar Azpilicueta is originally a right back who has been playing left back for two years now; he has had to adapt his game to the left-back role and has done it successfully.
However, there is a lack of depth in Chelsea's full-back area. Therefore, Chelsea are poised to complete the transfer of Baba Rahman from Augsburg in order to add some strength in depth. But who is he? And what could his arrival mean for this Chelsea team?
First, let's look at the player specifically. Abdul Rahman Baba is a Ghanaian international and still plays for Augsburg in the German Bundesliga. He has just broke onto the scene after a very successful 2014/15 season where he impressed in Germany and caught the eye of many a big club. His qualities are good; he's fast, powerful, loves to get forward and it also helps that he is so young being only 21. He still has plenty of time for improvement.
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Last year, his stats were very impressive as he registered four assists in the Bundesliga and made more tackles than anyone else with 108 and had a tackle success rate of 83% - which means he made 90 tackles successfully.
This shows he is very solid with his defensive duties, as Azpilicueta is also. But, what sets them apart is the fact he creates more for his team with having more dribbles completed, chances created and assists. This makes him a very well rounded young player and an exciting prospect.
Changes at the back
I have no problem with Azpilicueta as a left-back: he is very solid and is a vital part of a incredible Chelsea defensive unit. But with him being right footed and not left footed, it restricts his chances of attacking successfully.
It often becomes very predictable when he cuts back onto his stronger right foot, and against big teams it's very easy to defend against. With the introduction of Baba Rahman this could solve this problem and mean Chelsea could have another attacking addition on the left flank.
Potentially in the near future, Azpilicueta could return to his rightful position as right-back and replace Ivanovic and Baba could take over the left back role to give Chelsea a more natural looking defence.
This would be at the expense of Ivanovic who has been something of a Mr. Reliable over the last few seasons, but he struggled massively in his first game against Swansea bringing into question if he really is a right-back.
However, being realistic, Ivanovic has just been made vice captain for this season and it was the first game so he isn't in full form yet so it is very unlikely that Mourinho would make this change. If Filipe Luis couldn't bring about change, I'm not sure the young inexperienced Baba will. Only time will tell if this change needs to happen.