Whilst the Mexican driver has helped Red Bull achieve two 1-2 finishes so far this season, his seat might still not be safe.
The 2023 season saw Perez criticised for failing to match the pace of Max Verstappen, with Lewis Hamilton nearly catching him for P2 in the championship.
Discussing Sergio Perez’s seat with Sky Sports Germany, Marko also threw Sainz’s name into the discussion.
“Perez had his worst race last season here. Everything went wrong and now, you can see he can do it. You can see that it’s also about a seat for next season.
“We don’t usually talk about possible decisions but he’s been pushing towards the right direction. However, it is still too early for us to say. We still need some time before making a final decision.