The outfit had planned to run the whole package at Barcelona, but its technical team needed more time to work on the floor.

As a result, a series of other parts that were ready could not be added to the car until the floor was completed.

In addition to the floor and a Monaco-spec rear wing, Sauber will run new sidepod deflectors, rear brake ducts and additional bodywork elements.

It comes after Sauber ran a new rear wing, front wing flaps and front brake ducts in Spain as Pascal Wehrlein scored the team’s first points of the season with eighth.

Sauber is planning an “aggressive” development for the rest of the season in a bid to overcome the deficit created by running a year-old Ferrari engine.

The next update package planned for Austria, with further updates scheduled for the British Grand Prix at Silverstone.

The team also plans to run new developments at the post-Hungarian GP two-day test in August.

“We have made our development plan a step more aggressive,” says team principal Monisha Kaltenborn.

“That’s what we will be implementing, focusing on the next race in Monaco and then the races to come - Spielberg and Silverstone.

“We are not going to give up the season just because we have an old engine.”