Cristiano Ronaldo scored with a long-range rocket on a night when each Juventus goal was more spectacular than the other in a 3-1 win at relegation-threatened Genoa on Tuesday. Chasing a record-extending ninth straight Serie A title, the victory restored Juventus’ four-point lead over Lazio, which won 2-1 at Torino earlier on the day. Since losing the Italian Cup final to Napoli in a penalty shootout, Juventus have won all three of their league matches in the restart.