How does Nainggolan compare Chelsea enforcer Matic?

Manchester United and Chelsea are set for a transfer tussle as both sides line up approaches for Roma midfielder Radja Nainggolan. But how do the two central midfielders compare?

Manchester United and Chelsea are set for a transfer tussle as both sides line up approaches for Roma midfielder Radja Nainggolan.From United's perspective, the move is a fascinating one as Jose Mourinho has been strongly linked with a move for Chelsea's Nemanja Matic, who Mourinho coached at Stamford Bridge.But if it is Chelsea who land Nainggolan, that could push Nemanja Matic further down the pecking order and possibly closer to Old Trafford. But how do the two central midfielders compare?...