Europe's first week of grass season has been plagued by rain.
The quarterfinals are slated for's-Hertogenbosch and Stuttgart.
Let's take a stance on two matches.
Stefanos Tsitsipas and Andy Murray face battle in the third quarterfinal of the day in Stuttgart.
As predicted, Tsitsipas is a heavy favourite, due to his long runs at important tournaments and ranking.
The Greek has had trouble managing grass throughout his career.
His style doesn't fit the faster, slicker surface. Tstisipas' serve benefits on grass, although his return game and one-handed backhand are disadvantages.
Tsitsipas' break percentage is below 15%. As long as opponents can score easily by attacking his backhand, it won't change.
His superior return abilities help him to impose pressure on his opponents' serve despite the faster court, while his serve and forehand combination improve.