Ferrari designer Simone Resta is to leave the team to join Sauber as the Swiss outfit's technical director.
Resta is head of vehicle product co-ordination at Ferrari, effectively number two to technical director Mattia Binotto.
Mercedes boss Wolff (left) and Red Bull counterpart Horner have concerns over limits being imposed to their budgets
Formula 1 must proceed carefully with plans for a cost cap because of the risk to jobs, leading team bosses say.
F1 rights holder Liberty Media wants to impose a cap of $150m (£112m) a year on teams in a wider shake-up from 2021.
Christian Horner believes Verstappen has had some 'harsh lessons' this year
Max Verstappen is "trying too hard" and needs to learn from Red Bull team-mate Daniel Ricciardo, says team boss Christian Horner.
Ricciardo won Sunday's Monaco Grand Prix while Verstappen finished ninth after missing qualifying following a crash in practice.
Daniel Ricciardo drove a masterful race to fend off Sebastian Vettel's Ferrari and win the Monaco Grand Prix in a stricken Red Bull.
The Australian dominated the weekend and led from pole but shortly after his only pit stop suffered a power loss at one-third distance.
"Women are the most beautiful thing in the world," said world champion Lewis Hamilton in response to use of female models before Sunday's Monaco race
It is wrong to objectify women in sport says boxer and anti-sexism campaigner Stacey Copeland, after world champion Lewis Hamilton welcomed the return of "beautiful" women to the F1 grid.
Models for watchmaker Tag Heuer will feature before Sunday's Monaco Grand Prix - though not in 'grid girl' roles.
