they updated the article to include in the details. €68.4m includes gate receipts.
market pool is €80m
half of it, €40m is split according to previous year's league position. since only 2 teams it's 55:45 split
so Juve get (55% of 40) €22m from this half guaranteed.
the other half €40m is split according to the number of matches played... since Juve qualified for knockout stages Juve will be playing atleast 8 matches, compared to 6 of Roma.
so Juve gets atleast {(8/8+6)*40} €22.85m from this half, can increase to €25m {(10/10+6)*40} if Juve qualify for QFinals. the further Juve go the more Juve get from this portion at the expense of Roma's CL revenue...
then there are performance based pays
CL group stage participation = €8.6m
win in gs = €1m
draw in gs = €0.5m
r of 16 = €3.5m
qf = €3.9m
sf = €4.9m
f= €6.5m
champions = €4m