Simple Question - who makes it to the semi’s out of the group and go on to win the ‘All-Star Tour Finals’?

Give me the scores and your reasoning for it, as well if you can.

For players that have won the tournament multiple times, I’ve selected their peak season to avoid any ‘Djokovic beats Djokovic’ answers and to give the whole draw some balance.

The surface is the indoor hard court at the o2 Arena.

Red Group

• Novak Djokovic (2015)
• Nikolay Davydenko (2009)
• Alexander Zverev (2018)
• David Nalbandian (2005)

Blue Group

• Roger Federer (2006)
• Andy Murray (2016)
• Lleyton Hewitt (2001)
• Daniil Medvedev (2020)