Against whom did Sachin Tendulkar score the most international hundreds?

Sachin Tendulkar, who turned 51 today, scored 100 international hundreds in his career spanning 664 matches. Sachin's most international hundreds came against Australia (20), followed by Sri Lanka (17) and South Africa (12). He slammed nine hundreds each against New Zealand and England. Sachin scored 53 of his 100 hundreds in winning cause. Sachin hit six hundreds in World Cups.