UPDATE 4-Soccer-Fluke own goal sends Inter nine clear

* Isla own goal helps leaders Inter go nine points clear

* Pellissier hits hat-trick as Chievo draw 3-3 at Juventus

* Milan leave it very late to beat Lecce (adds AC Milan v Lecce)

By Mark Meadows

MILAN, April 5 (Reuters) - Inter Milan moved within touching distance of retaining their Serie A title after a fluke own goal from Udinese's Mauricio Isla sealed a 1-0 win on Sunday.

With eight games remaining, Inter have increased their lead to nine points after second-placed Juventus earlier allowed Chievo striker Sergio Pellissier to score a hat-trick in a 3-3 draw in Turin.

Hosts Udinese had dominated Inter until Patrick Vieira charged into the box in a rare foray forward on 77 minutes and the ball rebounded off Isla's leg into the net.

Udinese's Fabio Quagliarella had two penalty shouts turned down and a shot expertly tipped over by Inter goalkeeper Julio Cesar, who later went off injured.

Inter were extremely lucky but Juve, who host the champions on April 18, only had themselves to blame for letting Pellissier head in a stoppage-time equaliser.