Bryan Robson has hailed Ander Herrera as a key figure for the club . Manchester United are just two points behind neighbours and rivals City . Ex-United captain Robson recognises Herrera 's qualities and hard work . READ : Why has it taken Louis van Gaal so long to play Herrera ? The former England international is one of several players who have been linked with moves away from Old Trafford this summer, but Van Gaal's decision not to sell him in January was seen by some fans
Bryan Robson has hailed Ander Herrera as a key figure for the club . Manchester United are just two points behind neighbours and rivals City . Ex-United captain Robson recognises Herrera 's qualities and hard work . READ : Why has it taken Louis van Gaal so long to play Herrera ? CLICK HERE for all the latest Manchester United news .