'On one hand' or 'on the one hand'?

We usually say 'On the one hand... on the other hand'.

 On the one hand, Portugal was an exciting team. On the other hand,
their defence wasn't strong.

However, this phrase is overused in Hong Kong. Only use it for comparing two different facts or two opposite ways of thinking about a situation. Many people use it like 'also' or 'further'. Don't!