The Spaniard said it is hard to predict the outcome of the British Grand Prix, with Ferrari resurgent after a one-two in France.
Schumacher was the quickest, 0.172 seconds ahead of champion Alonso, on a damp track after morning drizzle at an overcast circuit.
Renault's world champion Fernando Alonso has been elected as a director of the Grand Prix Drivers' Association in place of retiring Ferrari rival Michael Schumacher.
Finland's Kimi Raikkonen won the French Grand Prix on Sunday, leading Brazilian team mate Felipe Massa in a Ferrari one-two to end McLaren's winning streak.
Brazilian Felipe Massa put Ferrari on pole position for the French Grand Prix on Saturday.
Michael Schumacher's manager has accused Fernando Alonso of 'pitiful behaviour' after the Formula One world champion described the German ace as the least sporting driver of all time.
The 22-year-old British rookie secured his second victory in a row and moved 10 points clear in the Formula One championship.
The British rookie, who celebrated his first Formula One pole in Canada last weekend, pipped double world champion Alonso in final qualifying on another sizzling hot day at the Indianapolis Motor Speedway.
McLaren's double world champion Fernando Alonso was quickest in Saturday's final free practice before qualifying for Sunday's U.S. Grand Prix.
Double world champion Fernando Alonso was fastest in both free practice sessions for the U.S. Grand Prix on Friday, with McLaren team mate Lewis Hamilton a close second in the afternoon.
Rookie sensation Lewis Hamilton can stretch his championship lead and add to the discomfort of McLaren team mate Fernando Alonso in Sunday's US Grand Prix.
Double world champion Fernando Alonso said on Tuesday he felt a little uneasy with the euphoria surrounding McLaren team mate Lewis Hamilton's impressive start in Formula One.
The Briton said McLaren are giving him the same chance of winning the title this season as team mate Fernando Alonso.
Renault's world champion Alonso finished second ahead of Ferrari's Michael Schumacher.
Michael Schumacher blamed himself for a red flag error that wrecked his Hungarian Grand Prix hopes.
Double world champion Fernando Alonso gave Renault's 2008 Formula One car an encouraging track debut on Monday ahead of next week's formal launch.
Spain's first race winner and first F1 world champion shrugged off suggestion that he is the face of a new era.\n
Spaniard Pedro de la Rosa says compatriot Fernando Alonso should have no worries about joining McLaren from Renault in 2007.
The double world champion made a perfect start to his return to Renault with the fastest time in testing at the Jerez circuit.
Lewis Hamilton expects McLaren to be a far more harmonious team now that Heikki Kovalainen has replaced Fernando Alonso.
The Ferrari driver ended world champion Fernando Alonso's run of five successive poles.
Ferrari's Felipe Massa took pole position for the Malaysian Grand Prix with a scorching last lap in Saturday's qualifying.
Renault's Formula One world champion scored his fourth consecutive victory of the season.
Formula One leader Max Verstappen passed Mercedes rival Lewis Hamilton on the penultimate lap to win a tense French Grand Prix for Red Bull on Sunday and canter 12 points clear at the top.
Fernando Alonso has credited McLaren with restoring the motivation he lost after five years at Ferrari.
Finn Kimi Raikkonen reported back to work as Formula One world champion on Tuesday.
Formula One's move to a single tyre supplier has hit champions Renault hardest, team boss Flavio Briatore said after Sunday's season-opening Australian Grand Prix.
Briton Lewis Hamilton was congratulated by Formula One greats Jackie Stewart and Stirling Moss after a sparkling start to his grand prix career in Australia on Friday.
Schumacher will be absent from Formula One's season-opening race for the first time since 1991 on Sunday.
Double world champion Fernando Alonso hopes to get his McLaren career off to a winning start on Sunday in an Australian Grand Prix that is far more than just a season-opener.
The Dutchman stopped Hamilton from winning an eighth title with a gutsy turn in the final lap.
Only two men in very different eras, Michael Schumacher and the late Juan Manuel Fangio have won three titles or more in a row.
Former Toyota driver Ralf Schumacher dropped heavy hints on Sunday that he would leap at the chance to fill the McLaren seat vacated by Fernando Alonso.
Renault rookie Heikki Kovalainen escaped unhurt from a 200kph crash in Formula One testing in Bahrain.
McLaren: Raikkonen produced a brilliant race with a two-stop strategy.