Chelsea on Sunday completed the signing of Ghana international Baba Rahman from Bundesliga club Augsberg. The Premier League champ had been looking for a left backfollowing Filipe Luis’ return to Atletico Madrid earlier this summer. According to reports, Chelsea paid close to 20 million-euros ($22.2 million) for the 21-year-old. Rahmanwill now offer coach Jose Mourinho an alternative to Cesar Azpilicueta at left back. The Spaniard in turn will provide cover for BranislavIvanovic at right back.