AGONAsport Sales August 6, 2019 Tennis Is it Doubles Trouble for Tsitsipas as Kyrgios vows to "stay away?" AGONAsport Sales August 6, 2019 Tennis AGONA SALES: Greek tennis sensation, Stefanos Tsitsipas has once again been causing quite a stir amongst his fellow players - just days after teaming up with Australia’s Nick Kyrgios to take on the Doubles event at the Citi Open in Washington.