Spanish GP: Sauber's Monisha Kaltenborn explains team's revival

Lee McKenzie speaks to Sauber team principal Monisha Kaltenborn about the improvement of the team in 2015.

Sauber failed to score a single point in the 2014 season and, despite a promising winter testing programme, contract issues with Giedo van der Garde threatened to undermine their first race in Australia.

But after reaching a settlement with Van der Garde, Felipe Nasr went on to finish fifth in Australia in his first race in F1, a result the Brazilian rookie describes as "emotional".

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