Jay Clarke had a big win in the previous round but I see the Brit losing this match. She was well prepared. Asked to elaborate, he said: "I just played bad".
Tomic has been in trouble for "tanking" during matches before and was fined here in 2017 after admitting faking an injury during a loss to Mischa Zverev in the first round, saying later he was "bored" with Wimbledon. Mentally I knew it was a long way to the finish line for my opponent.
Positives noises from Williams' coach, Patrick Mouratoglou, were the first real hint that it could happen, and Murray added further intrigue on Monday when he said he was 90 per cent sure who he would play with and that it could "possibly" be the American.
After edging a mammoth third-set tie-break 12-10 to lead two sets to one, Kyrgios then lost the fourth set to love in just 18 minutes.
He held his arms aloft after forcing a final error from Rubin before celebrating with his family, who have played a huge role in his journey from inner city Derby to the most prestigious stage in tennis.
"He won juniors the year I was born", said the 20-year-old. Tried to copy a lot of the stuff he does.
The American was one of four top-10 seeded women to lose in the first round previous year, and also went out in her opening match in 2017. I really had time to figure out it was all about managing the nerves. I actually gave up in the end because it was too tough to do. "I was happy when I stopped".
Andy Murray and Serena Williams are set to team up for the mixed doubles tournament at Wimbledon next week, with the American heavily hinting at the partnership after her win in the singles event today.
"Obviously on Center Court, you could be embarrassed".
"Just because I've had good results in the past doesn't mean you're going to keep producing it", said second seed Federer, playing at Wimbledon for a professional era record 21st consecutive year.
"I think it was a little bit different, but the nerves and everything are the same".