Stefanos Tsitsipas and Alex de Minaur will meet in the championship match of the Next Gen ATP Finals in Milan, after both went the distance in respective victories on Friday. Aussie De Minaur’s breakthrough season got even better in the early match, as the 19-year-old defeated Spaniard Jaume Munar 3-4, 4-1, 4-1, 3-4, 4-2. While De Minaur and Munar had …