Dries Mertens scored a second half hattrick as Napoli did their best to keep the Serie A title race alive by thrashing Bologna 6-0 on Tuesday.

Manolo Gabbiadini set Napoli, still missing Serie A topscorer Gonzalo Higuain as he sat out the final match of his three-match ban, on their way with a first-half brace. David Lopez completed the rout.

The win left Napoli six points behind leaders Juventus who host Lazio on Wednesday.

Despite Napoli's efforts on Tuesday, Juventus need only seven points from their last five games to clinch a fifth successive title.

Gabbidiani opened the scoring with a stylish finish in the 10th minute, turning to sweep the ball home with an angled shot after Mertens chipped the ball over the Bologna defence, and then added another from a penalty in the 35th.

Mertens opened his account in the 58th minute when he twisted one way and then the other to outfox his marker, then scored with a low shot which was deflected past Antonio Mirante.

The Belgian then exchanged passes with Omar El Kaddouri before adding the fourth in the 80th minute and completed his hat-trick eight minutes later with an unstoppable shot past Mirante.

Lopez completed the rout with a fortuitous effort after his first shot was stopped by Mirante but the rebound hit his chest and flew into the net.