Latest qualifying positions:
1. F Alonso (McLaren)
2. L Hamilton (McLaren)
3. F Massa (Ferrari)
4. N Heidfeld (BMW Sauber)
5. K Raikkonen (Ferrari)
6. R Kubica (BMW Sauber)
7. H Kovalainen (Renault)
8. N Rosberg (Williams Toyota)
9. J Trulli (Toyota)
10. J Button (Honda)
LATEST ACTION (all times BST)
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1400: Qualifying finishes with Spain's Fernando Alonso in pole for Sunday's race, from McLaren team-mate and championship leader Lewis Hamilton.
It is Alonso's second pole of the season after Monaco and after such an impressive start to the weekend he will be looking to make further inroads into Hamilton's five-point lead.
Alonso posted a fastest lap of 1:21:718, compared to Hamilton's 1:21:956. Massa's best, in contrast, is 1:22:309.
Ferrari's Felipe Massa is third, but the big news is that team-mate Kimi Raikkonen is pipped to fourth by BMW Sauber's Nick Heidfeld.
1359: Slightly more than one minute left and it looks certain that Fernando Alonso with start in pole on Sunday, with McLaren team-mate Lewis Hamilton also at the front of the grid.
1356: Four minutes remaining. Fernando Alonso, fastest all weekend, in pole position. Lewis Hamilton is second, half a second clear of the Ferrari duo.
1354: All 10 drivers are out on the track. Jarno Trulli is up to sixth.
1353: The big four all come in for a change of tyres. We are moving into the business end of qualifying now.
1351: The pole position shoot-out continues - there are eight minutes left to see who will start at the front of the grid on Sunday.
1348: Lewis Hamilton moves to the top of the qualifying rankings - but will Fernando Alonso, down to fourth, continue his fine form.
1345: The top-10 shoot-out has just started. Fernando Alonso has been looking very good. Lewis Hamilton was at the front of the crew, so may well get in an extra lap.
Jensen Button is in the top-10 shoot-out for the second time this season - the previous at Monte Carlo.
1337: Q2 finishes - and another six drivers drop out.
They are Anthony Davidson (Super Aguri), Sebastian Vettel (Toro Rosso), Alexander Wurz (Williams), Mark Webber (Red Bull), Giancarlo Fisichella (Renault) and Rubens Barrichello (Honda).
Honda's Jensen Button pulls out a fantastic lap to take him into eighth - and keep him in for the final session of qualifying. An amazing drive from the Brit.
Still the two McLaren's at the top of the pops, with the Ferrari's behind. The McLaren's are desperate for a win on Italian soil given their intense current rivalry with Ferrari.
1335: Just two minutes left of Q2 - so far, so good for McLaren, who currently have the top two cars in the standings.
1332: Fernando Alonso moves back to the top, taking almost quarter of a second out of McLaren team-mate Lewis Hamilton.
1327: Ferrari's Felipe Massa and Toyota's Jarno Trulli are back out on the track.
1325: Q2 has started at Monza. Giancarlo Fisichella has had a change of chassis.
1323: Given all the external pressure on the McLaren team it has been an extraordinary performance through the first qualifying session.
1315: The first session of qualifying has finished - with David Coulthard out after skidding off the track. Ralf Schumacher also fails to make it through. It is proving to be a difficult time for the German.
"This weekend we have struggled a bit, we'll have to wait and see what Jarno Trulli can do with a bit more rubber," said Ralf Schumacher.
The other four to drop out are Spyker duo Adrian Sutil and Sakon Yamamoto, Super Aguri's Takuma Sato and Toro Rosso's Vitantonio Liuzzi.
Fernando Alonso is quickest, from team-mate and championship leader Lewis Hamilton. The two Ferraris of Felipe Massa and Kimi Raikkonen are third and fourth.
1314: The track temperature at Monza, known as La Pista Magica (the magic track), is 30C.
1310: Lewis Hamilton is out on the hardest of his available Bridgestone tyres. He is the fastest so far.
1304: Kimi Raikkonen is out on the track - he has the engine from the race car in the spare following his 200mph crash this morning. It has yet to be established whether the crash was his fault. Despite his problems Raikkonen is setting good times, as is Jarno Trulli.
1300: The qualifying session moves under way. It will last one hour - and McLaren will be desperate to maintain their advantage over the Ferrari's in the practice.
1230: Now then. Qualifying is due to start at 1300 and one suspects that Ferrari's Kimi Raikkonen might have a headache after his 200mph crash in the final practice session this morning.
Raikkonen emerged unscathed but is short of laps through the practice sessions after problems on Friday as well.
Just in case you need reminding, here are the rules again for qualifying:
It is a crucial weekend in the season, with five races left and another Grand Prix in Belgium next weekend.
After the first 15-minute session, the slowest six cars will be eliminated. Six more cars will then be eliminated during a second spell before the remaining top 10 cars battle it out for the grid positions.
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Leading Italian GP final practice times:
1. Fernando Alonso (Spain) McLaren 1 min 22.054 secs
2. Lewis Hamilton (Britain) McLaren 1:22.200
3. Felipe Massa (Brazil) Ferrari 1:22.615
4. Nick Heidfeld (Germany) BMW Sauber 1:22.855
5. Robert Kubica (Poland) BMW Sauber 1:23.287
6. Nico Rosberg (Germany) Williams-Toyota 1:23.454
7. Alexander Wurz (Austria) Williams-Toyota 1:23.596
8. Jarno Trulli (Italy) Toyota 1:23.672
9. Heikki Kovalainen (Finland) Renault 1:23.672
10. Mark Webber (Australia) RedBull-Renault 1:23.708