But how did the Spurs team perform against their London rivals?
Gazzaniga had not played in the Premier League since December 2015 and overcame a rocky start to deliver a fine performance, making three excellent saves to stop Palace opening the scoring.
"Last night I saw Michel wasn't very good so I prepared already and Toni (Jimenez), the goalkeeper coach, told me I was going to play today so I was ready from last night".
Eric Dier was also full of praise for the former Gillingham stopper, saying: "It was a great day for Paulo, I thought he did really, really well".
"Gazzaniga only found out he was playing this morning and then came in and did really well".
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I can't ask much more of what the players are giving for us.
"There's no point beating Real Madrid on Wednesday if you can't win at here at home on the weekend as well".
Palace stuck gamely to its task, repelling numerous crosses and limiting Spurs to long-range efforts, and home frustrations soon turned to fears when Harry Kane went down clutching his ankle after taking a kick from Tim Fosu-Mensah.
Gazzaniga also had to be alert to deny Luka Milivojevic's close-range header and Palace were made to pay for their profligacy.
The Argentine was finally backed up in the 64th minute as Spurs poured forward, Palace's stretched backline clearing twice but a third fell to Son on the edge of the area and the Korean blasted past Julian Speroni with his left foot. "We knew they'd dominate possession with the quality they have but we worked hard to restrict them and they didn't have many shots to worry us".