The Portuguese star has been part of the creative heartbeat of Sundowns' campaign this season, racking up an impressive eight goal contributions in just nine appearances.
With three goals and five assists to his name, Santos has proven to be the man for the big occasion, consistently delivering from open play and dead-ball situations alike.
Reflecting on the pressure of the upcoming first leg, Santos remained calm.
He stated: "Every game is difficult, not just this one, but like the previous games in the Champions League, no game is easy for us.
"We know the responsibility we have, and we’ve moved our focus on what’s coming, which is the first leg of the Champions League.
"So we cannot do anything to change what happened before. Total focus on the first leg at Loftus."