It is hard to judge which was the most surreal image on the eve of the ATP World Tour finals in London: Novak Djokovic scrolling through his mobile phone messages on the Jubilee line or the speaker of the House of Commons, John Bercow, declaring his undying love for Roger Federer in the oil-painted shadow of Betty Boothroyd.
In October, 20-year-old Tsitsipas brought home Greece's first ATP crown from the Stockholm Open, after knocking out Latvia's Ernests Gulbis.
No SA singles player has won the ATP Finals, but in 1977 Frew McMillan and Bob Hewitt won the doubles, while Piet Norval and Ellis Ferreira also won the doubles in 2000 and 2001 with American partners Donald Johnson and Rick Leach.
Rafael Nadal has won the Stefan Edberg Sportsmanship Award for the second year ever after 2010.
The seven-time champion may not come on the back of the most promising run, but Federer is always one of the favourites going into the Tour Finals in London.
He sported a poppy, the symbol the British wear at this time of year to honour those who died in the world wars, and exalted in being a tourist in London, though his hotel room opposite the Houses of Parliament offers a view onto scaffolding and cladding round Big Ben, rather than the clock itself. In fact, the trio of Cilic, Zverev and Thiem collectively won two matches out of nine at the 2017 Finals and crashed out in the round-robin stage. Kei Nishikori and Marin Cilic, the players expected to follow in the footsteps of Federer, Nadal and Djokovic, have shown no inclination to do so.
Kevin Anderson will take on French Open runner-up Dominic Thiem in the afternoon session. Normally the big servers prefer indoors because they have the advantage. After six hours and 36 minutes, the South African prevailed 7-6 (6), 6-7 (5) 6-7 (9), 6-4, 26-24.
Although the new generation of players has yet to win a major singles title, the youngsters are making inroads elsewhere with Alexander Zverev, 21, and Karen Khachanov, 22, winning Masters 1000 titles in 2018 and with Borna Coric, 21, beating Federer twice.
The top-ranked Djokovic told BBC Sports on Friday that "the match is not happening this year" because of Nadal's injury. "I've learned that I need to be 100 per cent from the very first ball".
As semi-finalist and finalist in Brisbane and Sydney, respectively, in January, de Minaur became the first 19-year-old to reach successive ATP semi-finals since Rafael Nadal in 2005. "You don't get any presents when you're playing against the Top 8".