He has only once gone past the 20 mark for aces despite having played three four-set matches and his double-fault count averages seven per match, while breaks of serve
will be few and far between.
The eighth seed raced through the second 6-1 with two more breaks of serve
to book a meeting with Petra Rohanova or Chanelle Van Nguyen in the last 32.
Although Safina had three breaks of serve
in the first set, a woeful display from the Russian allowed Rogowska to break back every time and take the set into a tie-break.
Two breaks of serve
- the second secured with an exquisite backhand winner - saw Henman race into a 4-0 lead.
Henman, in his first match since taking on Larry Stefanki as his coach, won his first set with breaks of serve
in the fourth and ninth games, but it was a scrappy display.
The British number one triumphed 6-4 2-6 6-4 in a match with eight breaks of serve
to move into the quarter-finals of the Champions' Cup.
He went on to reel off the first four games with two breaks of serve
Haas dominated the opening set with two breaks of serve
and, although Henman saved seven match points during the second, the German eventually prevailed 7/5 in the tie-break to advance to the quarter-finals.
Graf took an extraordinary first set which saw six breaks of serve
as both players struggled to find any sort of rhythm in the blustery conditions which played havoc with the German's high service toss.
Then two breaks of serve
gave the British number one the second set 6-1 and the 30-year-old went on to complete a fine victory.
A tight third set, with no breaks of serve
,came to life at 5-5 whenHenman broke to give himself the chance of serving for the match.