Fill in the blanks with the most appropriate option:-

Sachin always gained an advantage ……. me.

over

The correct option to fill in the blank is over.

The word "over" means "in a position superior to" or "in control of". It is the most appropriate word to use in this context, as Sachin always had an advantage over you.

The other options are not as appropriate:

• On means "in contact with" or "supported by". It would not be accurate to use "on" in this context, as Sachin did not have an advantage on you.
• To means "in the direction of" or "in order to". It would not be accurate to use "to" in this context, as Sachin did not have an advantage to you.
• Upon is a more formal version of "over". It would not be accurate to use "upon" in this context, as Sachin did not have an advantage upon you.