Real back on top after Osasuna win, Barca rout Alaves

By Richard Martin BARCELONA (Reuters) - Real Madrid returned to the top of La Liga after winning a testing game at Osasuna 3-1 on Saturday thanks to goals from Cristiano Ronaldo, Isco and substitute Lucas Vazquez. Osasuna striker Sergio Leon cancelled out Ronaldo's 24th-minute opener after defender Tano had been carried off with a sickening double leg break while Real defender Danilo was forced off with an injury in the second half. Isco restored Real's lead in the 62nd minute and Zinedine Zidan