Moving between back four and back five mid-game - Alonso's tacticspublished at 09:12 BST
Umir Irfan
Football tactics correspondent
Image source, Getty ImagesWhether Xabi Alonso starts with a back four or back five, this shape is fluid. He has shapes he looks for during certain parts of the game and asks players with the appropriate skillset to move into specific positions within that shape.
For example, higher up the pitch, Alonso often looks to place five players on the last line of attack, who then take it in turn to drop deep and show for the ball. These five players can be arranged in a number of ways.
This can be with two wing-backs and three narrow attackers from a back-five formation, if the wing-backs are strong in attack.
Starting in a four-at-the-back system, it can be done with one full-back and one winger on either flank - with any combination of three midfielders or attackers playing centrally.
With Chelsea opting for a back five against Manchester City in the FA Cup final and at times under Liam Rosenior, they do possess players capable of playing either shape.
Marc Cucurella and Malo Gusto have moved from full-back or wing-back positions into central attacking positions higher up the pitch under both Enzo Maresca and Rosenior, something Alonso might utilise.
The likes of Pedro Neto and Alejandro Garnacho, although natural wingers, have also played as wing-backs.
Geovany Quenda of Sporting, set to join Chelsea this summer, is an exciting young wide player too - capable of playing as a winger and wing-back.
Alonso might opt to use him in a similar fashion to Frimpong at Leverkusen, closer to the touchline and alternating between full-back, wing-back and winger.
Read more on tactics Alonso could use with the Blues here

Compared with Alonso's side on the ball, this example under Maresca appears to have the same shape in possession. The wide players are Jamie Gittens and Pedro Neto, rather than wing-backs. Full-backs Malo Gusto and Marc Cucurella instead take up central positions. Alonso will set Chelsea up based on the players' skillset, so seeing wingers out wide with full-backs centrally - given Cucurella, James and Gusto's quality in midfield - would not be a surprise.
























