Juan Martin del Potro crushes Filip Krajinovic in Miami Open pre-quarters

Juan Martin del Potro sent his devoted fans home happy by powering into the ATP Miami Open quarter-finals with a 6-4, 6-2 triumph over Serbian Filip Krajinovic.

Juan Martin del Potro, of Argentina, returns to Filip Krajinovic, of Serbia, during the Miami Open. | AP 

Filip Krajinovic returns to Juan Martin del Potro during the Miami Open. | AP

Juan Martin del Potro returns to Filip Krajinovic during the Miami Open. | AP

Filip Krajinovic reacts after missing a point against Juan Martin del Potro during the Miami Open. | AP

Juan Martin del Potro reacts after winning a point against Filip Krajinovi during the Miami Open. | AP

Filip Krajinovic hits a forehand to Juan Martin del Potro during the Miami Open. | AP

Juan Martin del Potro, right, shakes hands with Filip Krajinovic after winning their match at the Miami Open. | AP