The three Spaniards have formed a close bond at Old Trafford and De Gea was the first to be on hand to welcome Mata to the club when he joined last January.
Since then, Herrera has joined the club along with a number of other Spanish speaking players such as Radamel Falcao, Angel Di Maria and Marcos Rojo.
Herrera and Mata in particular have formed a good connection on the field as well as off it and United’s no.1 believes it is important for the team as a whole.
“We all get on very well, both on and off the field, and I think that can have an influence in making the team play better,” De Gea told MUTV before the clash at Stamford Bridge.
“For example, when Juan and Ander are both playing, they have a great understanding on the field and that really helps. They know each other really well, from way back with the various youth levels of the national team.
“I think they have been combining superbly and they can achieve great things at this club. We’re really good mates and it’s marvellous to have them all here.”
With speculation over De Gea’s long-term future continuing, United fans will hope the three way bromance isn’t split up any time soon, especially given the three of them are currently the most in-form players at the club.