Although Arsenal haven't added youthful energy to their squad over the winter they have catered to the needs of Mikel Arteta. Jorginho isn't the glamour pick but he's a player that Arteta admires and is easy to see fitting in with the Spaniard's squad.
The Italian, at 31, is now the oldest player in the squad and is a different type of player to those seen at the Emirates Stadium this season. His lack of physicality is very different to Thomas Partey and his play style is slower, but it doesn't mean there isn't a very important role for him though.
He adds valuable experience from some of the biggest games in world football and also just being a different option gives Arteta new choices. For £12m on a 18-month deal it is hard to see the move going badly wrong. He was a well-liked character in the Chelsea squad and has played nearly 150 Premier League matches across four-and-a-half years.