What would happen if both teams played only two players?
thats depend on the situation, in a normal cup game the home team get in the enxt round.(on neutral court the team who got selected at the home team "spot")
Cup final like in argentina, there is no cup winner.
In league it get complicated:
It counted as a no win, at the moment the play offs and relegation games get calculated. At the end for the season(before the draft) the home team get the win, so you might see a fifth placed team play the relegation like in happen befor two or three season in my league.