I Still think Madara has his chances of defeating both of them, Not sure how much of a chance but this is far from a stomp match.
But people saying Naruto/Sasuke solo i just don't understand. Madara has both Halfs of the sages power Plus the juubi, While Naruto only has Half of the sages strength and parts of the bijuu's chakra ( Madara's both halfs > Naruto's one half/Juubi > Naruto's Bijuu parts), Sasuke only has half of the sages strength plus the Majority of the bijuu's chakra (Madara's both halfs > Sasuke's one half/Juubi > the bijuu sasuke posses, Plus on top he has dual rinnegan while sasuke does not)
Obviously Madara's feats aren't super great but thats simply down to him getting put down before he ever got remotely serious.
But people saying Naruto/Sasuke solo i just don't understand. Madara has both Halfs of the sages power Plus the juubi, While Naruto only has Half of the sages strength and parts of the bijuu's chakra ( Madara's both halfs > Naruto's one half/Juubi > Naruto's Bijuu parts), Sasuke only has half of the sages strength plus the Majority of the bijuu's chakra (Madara's both halfs > Sasuke's one half/Juubi > the bijuu sasuke posses, Plus on top he has dual rinnegan while sasuke does not)
Obviously Madara's feats aren't super great but thats simply down to him getting put down before he ever got remotely serious.