Head to Head Sauber driver comparison for 2003 season.
[{'label': 'Heinz-Harald Frentzen', 'data': [6, 9, 10, 10, 10, 11, 11, 11, 12, 12, 12, 13, 13, 13, 10, 11]}, {'label': 'Nick Heidfeld', 'data': [None, 11, 13, 13, 15, 15, 15, 16, 15, 16, 16, 16, 16, 17, 14, 14]}]