Red Bull F1 driver U-turn on the cards as Helmut Marko considers replacing Sergio Perez
![Red Bull F1 driver U-turn on the cards as Helmut Marko considers replacing Sergio Perez](https://i2-prod.mirror.co.uk/incoming/article32060245.ece/ALTERNATES/s615/0_F1-Grand-Prix-of-Singapore-Practice.jpg)
Daniel Ricciardo and Yuki Tsunoda are gunning for Sergio Perez's Red Bull seat while others could be in the frame, but Helmut Marko is not certain the Mexican will be replaced