This invention relates toa combination of gemcitabine phenyl benzoxy L alaninyl) phosphate (chemical name: 2 Deoxy 2 2 difluoro D cytidine 5 O phenyl (benzoxy L alaninyl) phosphate)(NUC 1031) and a platinum based anticancer agentselected from carboplatin dicycloplatin oxaliplatin satraplatin and nedaplatin. The combinations are useful in the treatment of cancer and particularly ovarian cancer.