Today at Wimbledon: Everything you need to know about day four

• Federer safely through to round three

• Britain's Edmund takes his leave

• Shock defeat for third seed Pliskova

• Tomic and Medvedev hit with fines

Fed express keeps rolling

Federer defeats Lajovic 7-6, 6-3, 6-2

Roger Federer continued his serene progress at this year's Wimbledon with a comfortable straight-sets win over the Serbian world No 79 Dusan Lajovic in 1hr 29 min.

Federer was broken in his opening service game and made uncharacteristic errors in the first set, but he raced through the tie-break 7-0 and from there never looked back. 

The Centre Court crowd was treated to Federer's full repertoire of tricks as he produced scintillating volleys, ferocious forehands and his customary clever uses of spins and slices. Towards the end of the third set he even tried his patented SABR (sneak attack by Roger) off a Lajovic serve, though on this occasion he put his return into the net. 

Next up for Federer will be the German 27th seed Mischa Zverev in the third round on Saturday. Zverev has enjoyed a breakthrough year that included beating Andy Murray at the Australian Open.

Brit Edmund bows out

Monfils defeats Edmund 7-6, 6-4, 6-4

After a stellar day for the Brits on Wednesday with four players winning through to the third round, Thursday provided a sobering reality check. Kyle Edmund was the only home favourite playing in the singles, and he was comprehensively beaten in straight sets by the mercurial 15th seed Gael Monfils. 

Edmund - making his Centre Court debut - had chances in all three of the sets but he squandered break points in the first and then faltered when 3-0 up in the third and lost five straight games. 

The British No 2 has now lost five of his six matches at Wimbledon, and will be looking forward to getting onto his preferred hard courts for the north American summer swing. 

After the defeat, he said: "I enjoyed it. I didn't enjoy the loss, but I enjoyed the experience, being on the biggest court. I'm sure a lot of players would say the biggest court in the world."

It's all Ova for Karolina

Rybarikova defeats Pliskova 3-6, 7-5, 6-2

The women's third seed Karolina Pliskova is out of Wimbledon after a second-round defeat to Slovakia's world No 87 Magdalena Rybarikova. 

The big-serving Pliskova had looked on course for a straightforward win after taking the first set 6-3 but she eventually succumbed to a three-set loss. Ultimately Pliskova was made to pay for her profligacy on break points as she converted just three of 11 such opportunities. Her opponent by contrast took five out of six. 

After the match, Pliskova said: "Obviously it's disappointing but that's tennis, you know. Still, you still can play well and you don't have to win. That's my case today. I think was it was a very tricky opponent for a second round.

"I was close definitely to winning, but, yeah, I didn't play well enough today."

Pliskova's exit leaves Britain's Johanna Konta as the bookies' favourite to win the title. 

Winner of the day

If 18-year-old Stefanos Tsitsipas thought getting the call-up to practice with Novak Djokovic made Thursday a good day, then he would scarcely have believed his luck after receiving the same request from Roger Federer just two hours later.

The world No 192 is carving out quite the niche for himself. 

Loser of the day

Bernard Tomic’s racket sponsor Head has dropped the Australian bad-boy after he said he was “bored” during his first-round Wimbledon defeat to Mischa Zverev. Tomic has also been fined £11,600 for “unsportsmanlike conduct” after admitting that he faked an injury.

Running Tomic close is the young Russian Daniil Medvedev, whose decision to sprinkle some coins at the foot of the umpire’s chair on Wednesday has delivered spectacularly poor returns. Medvedev has been handed three separate fines, totalling £11,200, for his stroppy misdemeanours.

Good egg of the day

Juan Martin Del Potro’s match with Ernests Gulbis had to be delayed for around 20 minutes when a member of the crowd fell ill in the scorching heat. Del Potro did no harm to his nice-guy reputation by handing over a bottle of water to help the stricken spectator.

Stat of the day

24 - 24 men aged 30 or over made it to the second round, equalling the Open era record.