Extract specific words from the file

I am analyzing some text files and I want to extract a specific word every time that the word is found in the file.

Imagine that I have 'Sports' in the file then I want to extract the Word 'SPORTS' based on a list.

I've the following code:

content = ['Sports', 'Nature', 'Football']
path = filename
with open(path) as auto:
    for line in auto:
        if any(x.lower() in line.lower() for x in content):
            print(line)

My text file has this content:

Sports TV is the home of football videos. 
Complex game to follow.
home of football

With my code I print all the lines with 'Sports' and 'Football':

Sports TV is the home of football videos. 

home of football

But I want to see the following result:

Sports
football

How can I print only the word that I have on List instead of all the line?

Thanks!

list.txt:

Sports TV is the home of football videos. 
Complex game to follow.
home of football

Hence:

content = ['Sports', 'Nature', 'Football']
path = 'list.txt'

with open(path) as auto:
    print([[x.lower() for x in content if x.lower() in line.lower()] for line in auto])

OUTPUT:

[['sports', 'football'], [], ['football']]

Since:

line 1 had sports and football

line 2 had no matching elements from content list

line 3 had football