Marco Asensio's first-half winner to beat Espanyol 1-0 on Saturday was initially waived off for offside but eventually stood after assistance from the VAR.
Ronaldo, making his Juventus debut in a competition he has won five times, also had a new experience - getting a red card against Valencia for tangling with Jeison Murillo.
Dembele, who helped France win the World Cup in July, has the spot in the starting 11 alongside Lionel Messi and Luis Suarez that once belonged to Neymar.
Real Madrid will face either the champions of Asia or Mexican club Guadalajara in the FIFA Club World Cup semi-finals.
At 1-1 in the 48th minute and with Leganes holding their own, Benzema skillfully headed in an out-swerving cross from Marco Asensio despite tussling with defender Jonathan Silva.
Benzema scored twice and Bale once as Madrid came from behind to earn a 4-1 win at Girona on Sunday, remaining perfect in the Spanish league after two rounds.
Ronaldo moved from Real Madrid to Juventus in the offseason in a Serie A record 112 million euro (then $131.5 million) deal.
Beckham was the first English player to make 100 appearances in the Champions League and also helped Man United win the title in 1999.
Defending champions FC Barcelona have built a stronger unit after Iniesta's departure, whereas Atletico Madrid begin their season on a positive note after defeating a depleted Real Madrid.
Diego Costa equalized late in the match with his second goal before Saul Niguez and Jorge "Koke" Resurrection sealed the victory in extra time.
Real Madrid were built around Ronaldo and have won three straight Champions League titles come up against a strong Atletico team who won the Europa League.
Lopetegui is assured of Bale's success in the future and he thinks it's the perfect time for the Welshman to shine.
Thibaut Courtois was introduced by Madrid on Thursday, setting up a rivalry with Keylor Navas, the Spanish team's goalkeeper when it won the last three Champions League titles.
Kepa is considered Spain's goalkeeper of the future and was a reserve at the World Cup in Russia. The fee paid for him tops the 72.5 million euros Liverpool gave Roma for Alisson earlier this summer.
Kroos, a rare bright spot in a German side that crashed out of the World Cup group stage as title holders, was second last year behind former Bayern Munich teammate Philipp Lahm.
Manchester United forward Alexis Sanchez scored a goal and later provide an assist to Ander Herrera that lead to a 2-1 win over Real Madrid.
With Ronaldo now sporting the Juventus crest, Bale could not have been given a better opportunity to shine after the winger was mostly outshined by the Portuguese star since his arrival.
Last year, a Spanish state prosecutor accused Ronaldo of four counts of tax fraud from 2011-14 worth 14.7 million euros (USD 16.5 million).
Barcelona will play Madrid at Camp Nou during Round 10 on the weekend of October 27-28.
The 33-year-old has already paid 12.1 million pounds and will pay a total of 16.8 million pounds to evade the prison sentence.
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