So that's straight-set victories for both Novak Djokovic and Rafael Nadal in round one.
Can the other big names in the men's draw, Andy Murray and Stan Wawrinka do the same? They're both in action on Tuesday and we'll be back then to find out.
Britain's Johanna Konta will also get her campaign under way on Tuesday, as will Kyle Edmund.
Until then, goodbye. You can follow all of the rest of today's scores here.