Updates from the group game at the 02 ArenaNadal beats Tsitsipas in gruelling three-setterAnd you can email Tumaini here or tweet him here 9.11pm GMT
Second set: Daniil Medvedev 4-6 *4-4 Alexander Zverev: Is Zverev feeling the pressure after failing to win a point on Medvedev’s serve for three and a half games? No chance. He slams down a love hold of his own with a series of huge serves. A huge 104mph forehand down the line winner from the German. He closed it off with a 120mph ace out wide. We continue. 9.08pm GMT
Second set: Daniil Medvedev 4-6 4-3* Alexander Zverev: Medvedev is growing in stature and he slams down yet another love hold to move ahead again. He struck a
bomb of a crosscourt backhand winner to move up to 40-0, then forced a backhand error from Zverev with a nice inside out forehand. Medvedev has now won 14 points in a row on serve. Untouchable.