Real Madrid renewed its quest for a 10th Champions League title Tuesday with a 6-1 demolition of Galatasaray in Istanbul.

The match marked the Real Madrid debut of expensive new acquisition Christian Bale, who came in for Isco in the second half, and the return to the Blancos lineup of goalkeeper Iker Casillas.

But the veteran keeper had to leave in the 14th minute due to injury.

The Blancos took a 1-0 lead thanks to Isco's goal in the 33rd minute.

The visitors exploded in the second half, scoring three times in 12 minutes - Karim Benzema and two from Cristiano Ronaldo - to leave the Turkish side and their fans stunned.

Benzema picked up another goal in the 81st minute, followed a few minutes later by Bulut's lone tally for Galatasaray. Ronaldo completed the hat trick with a goal in the final minute of regulation.

In Tuesday's other Champions League action, Juventus had to settle for a 1-1 tie Tuesday with Kobenhavn in the Danish capital, while Spain's Real Sociedad, making its debut in the elite tourney, lost 2-0 at home to Shakhtar Donetsk.

Wayne Rooney's two goals led Manchester United to a 4-2 win over Bayer Leverkusen at Old Trafford and reigning champions Bayern Munich thumped CSKA Moskva 3-0 in the Bavarian city.

Visiting Manchester City won by the same score against Czech club Plzen, as Paris Saint-Germain embarrassed Olympiacos 4-1 in Piraeus.

Portugal's Benfica won 2-0 at home against Belgian club Anderlecht. EFE