Federer is in action against Mayer overnight, however the Swiss will have to wait as there are a backlog of second and third round matches that have been delayed due to the rain.
The world No 2 – who is bidding for an eighth success in Cincinnati – is playing in Ohio for the first time since 2015.
The Swiss legend – who was given a first-round bye – beat Peter Gojowczyk 6-4 6-4 in his second round tie to extend his winning streak in this ATP Masters 1000 series event to 11 matches with his last defeat coming at the hands of Rafael Nadal in the quarter-finals in 2013.
Federer, who finds himself nearly 4,000 points behind Nadal in the rankings, is fine-tuning his preparations for the US Open which gets underway in Flushing Meadows on August 27.
The 37-year-old, who is fresh from taking a month off after losing in the last eight at Wimbledon to Kevin Anderson, feels his game in a good place right now.
“I felt good in that first match, to be honest, walking out, hardly any nerves. I think I knew what I had to do,” Federer said after his win over Gojowczyk.
“It’s fast-court tennis. I knew my opponent was going to go for it and take big cuts at the ball, so there is only so much you can really do.
“It’s nice to have played a match so that my last match was not the Anderson match … you’ve kind of turned the page. It’s a good thing.
“The goal is now to recover from this match, take the positives with me. Of course the big goal is the US Open.”
When will Roger Federer vs Leonardo Mayer start?
Federer was supposed to take to court on Thursday August 16, but with rain delays, his match has been pushed back.
He won’t be on court before 7pm local time which is midnight UK time as Novak Djokovic is currently in action against Grigor Dimitrov on Center Court.
Roger Federer vs Leonardo Mayer TV channel
Amazon Prime are going to be a major disruptor in the world of tennis broadcast rights when they take over the lion’s share of ATP events from next season.
They bid around £10million a year for the privilege, outstripping Sky who paid £8million a year for the deal which expires this year.
In 2019, tech giants Amazon will exclusively show 38 ATP events including all 1000 level events like the Cincinnati Masters and have also taken the rights to the US Open.
However, this year’s Western and Southern Open, to use its officially sponsored name, will still be on Sky with coverage on both Sky Sports Arena and often on Sky Sports Main Event.
But Federer and Mayer’s match will not be on Sky’s main channel because of live coverage of the T20 Blast between Birmingham and Lancashire.
Instead, it will be exclusively live on Sky Sports Arena.
Roger Federer vs Leonardo Mayer live stream
Sky subscribers can stream the action online via SkyGo and the SkyGo app.
This means that all the tennis can be followed on your desktop or laptop via the Sky Go app, which if you’re an existing customer, is also available on iOS and Android smartphone and tablet devices.
Sky Go is also available on a number of platforms including Amazon Fire devices, iPad, Mac computers and laptops, Playstation 3, PS4 and Xbox One.
The Sky Sports app, available to download on iOS and Android devices, will also be providing live text coverage and updates.
If you’re not currently a Sky Sports customer but can’t stand to miss out on the action, you can add the channels to your box via a NOW TV subscription.
Day passes, which let you add Sky Sports channels for 24 hours, start at £7.99 a day, with a weekly pass starting from £12.99, and no locking in to a contract.
NOW TV doesn’t even require a typical television to use, as it is also available on a NOW TV Box, Chromecast, PS4, PS3, Xbox One, Xbox 360, Roku, LG Smart TV, PC or Mac, and selected mobile and tablet devices.