well that didn't happen, Medvedev didn't face a lot of trouble beating Opelka even though he has a big serve, 2-0 for Medvedev  with 6-4 in the first and 6-3 in the 2nd set, with a total of 19 games, i was expecting at least a tiebreak, it seems like Medvedev is starting to get closer to Djokovic to take over the number one spot.