Luis Suarez and Patrice Evra, John Terry and Anton Ferdinand, Samir Nasri and William Gallas, Terry (again) and Wayne Bridge, and now Pep Guardiola and Cristiano Ronaldo. The snubbed handshake is fast becoming football’s equivalent of unfriending someone on Facebook. But while previous examples have had their origins in personal slights, it seems the latest entry to the list has its origins in good old fashioned club rivalry.
