The British duo even collided on the start/finish straight at the end of Q2, breaking Hamilton's front wing and ending Russell's hopes of making it into the top 10.
Mercedes feel that the W14 is going in the right direction now after a disappointing start to the season
No huge leap expected
Wolff is expecting to see an improvement, especially in race trim, for Mercedes with these new upgrades but can't see how they will completely close the gap to Red Bull.
"I'm afraid now is not the right time to bet on a Mercedes victory, but I'm optimistic that it will come," Wolff said in an interview with oe24.
"We have now created a basis. In Barcelona, we will see how well the upgrades work. I'm not expecting a huge leap, but I hope things are going in the right direction."