Sauber Formula 1 boss Jonathan Wheatley says Nico Hulkenberg's unexpected fifth place in the Spanish Grand Prix is a huge relief for the team as its upgrades finally paid off.
Hulkenberg scored points for Sauber in a mixed weather season opener in Australia, but since then he and his team have unable to add to their tally as they found themselves on the wrong side of an extremely tight midfield battle.
