Answer:
He told me that they were playing football.
Explanation:
He said to me, "We are playing football."
Tense : Present Continuous Tense
To be changed into : Past Continuous Tense.
We => They
Also, The use of "that" as a conjunction in place of quotation marks.
Indirect Speech:
He told me that they were playing football.
[tex]\rule[225]{225}{2}[/tex]
Hope this helped!