Konta, 26, said: "He's helping me a lot on bringing out what's true to me, how I play instinctively".
"I played well. The last three games I didn't serve particularly well, but the rest of the match I served well, I was getting a lot of free points there, serving a lot bigger than I was in the first round which is good".
Rafael Nadal, a two-time Wimbledon champion, followed Murray on Centre Court against Donald Young.
Not since the day of the Wimbledon final of 1977 - which saw Viriginia Wade beat Betty Stove to claim the title - has a Briton been favourite to win the Venus Rosewater Dish.
If Sakkari is still able to wander around Wimbledon virtually unnoticed, Konta is slowly adjusting to the attention that has been building since her fighting win over Donna Vekic on Wednesday.
Their victories at SW19 bode well for Andy Murray, who is second up on Centre Court. Petchey obviously knows Konta's game well from his many years being around the Tour, as player, coach and commentator, and has alerted his new and temporary student to the size of her assignment.
"I've played quite a few big matches the previous year". So he is more than happy to share the spotlight with Johanna Konta, Aljaz Bedene and Heather Watson on what it is hoped will be one of the great days at the championships in recent history. "I think both myself and Donna played very well".
"After a break in the first set I found the momentum, which allowed me to make some drop volleys and also come up with some good passing shots".
Along with Azarenka, Kvitova's return at the All England Club has been the feel-good story of the championships but the two-time victor will play no further part after she was beaten by Madison Brengle. "I feel very fortunate to have come through that", said Konta, who had lost to the 21-year-old Croatian in the Nottingham grass court final last month.
Saved with an ace, Vekic would double again, this time she paid the price, powering a forehand long and Konta was back on serve.
Kvitova had the tendons in her left arm - her dominant playing hand - severed in a knife attack before undergoing a successful surgery and ongoing physical rehabilitation. Nishikori, the 9th seed, did need 3 hours and fifteen minutes to dispatch his 122-ranked Ukrainian qualifier 6-4, 6-7 (7), 6-1, 7-6 (6). For example, that money is more than semi-finalists would have received at last week's warm-up event in Eastbourne.
Former world number one Azarenka, playing her first Grand Slam tournament since giving birth to first child Leo in December, knocked out Russian 15th seed Elena Vesnina 6-3, 6-3. She's certainly good enough to win the tournament.
That the incident has taken an emotional toll on the tennis star was evident during the press conference after her match. Medvedev, who beat three-time grand slam champion Stan Wawrinka on Monday, reacted at the end of his second-round defeat to Ruben Bemelmans by taking out his wallet and lobbing coins at the foot of Mariana Alves' seat.