Real - who move up to third in the table - host PSG on Wednesday in the Champions League round of 16 first leg, with the trip to France not until Tuesday, 6 March.
Gotze scores on Dortmund return
Schalke refused to buckle, however, and was rewarded for its intensity when Franco di Santo equalized before the half-hour mark. Dortmund leapt up to third after Bayer Leverkusen surprisingly lost 2-0 at home to Hertha Berlin to slip to fifth.
PSG, with Lassana Diarra playing in defensive midfield and trying to stake a Champions League claim, came up against stubborn Toulouse resistance and Lafont saved well from Kylian Mbappé, then miraculously from Neymar. "I am happy at Chelsea and fully focused with them", Hazard said in the interview published on Friday; sticking to tried and true industry standard platitudes.
Hazard was key as the Blues cantered to Premier League glory last term in Antonio Conte's first season in charge and though Chelsea's title defence has fallen away this time around, the Belgium worldwide has been in imperious form.
It is Atletico's eighth 1-0 win of the campaign and temporarily moves them to within six points of FC Barcelona, who entertain Getafe in the Camp Nou Stadium on Sunday.
Real's big victory over Sociedad took them third above Valencia but they trail Barcelona by 16 points as they turn their attention to the defence of their Champions League title against PSG at the Bernabeu on Wednesday.
Still only 25, Isco is arguably the flawless Coutinho replacement for Liverpool, whose chances of landing the Spain worldwide are likely to hinge on their qualification for next season's Champions League - as well as the success of Real Madrid's Hazard pursuit. "We don't know how the season will finish but we still believe we can do very good things".