creating a dataframe from pairs of columns in Python

Question

Using the yfinance library I imported data from a list of 80 assets:

tickers=['xxx','yyy']
data = yf.download(tickers, start="2020-01-01", end="2020-12-04")
data = data['Close']

I used a function and extracted a list of pairs of those assets. According to my criteria I have selected 88 pairs.

Now I would like a function that creates a dataframe, for later export to Excel, where each Worksheet would receive the name of the pair and the quotes of each asset organized in columns B and C, the column A being reserved for the date.