Proof that tennis matches are won in the head as much as they are with the hand was provided by the two Britons on display at the first day of the DFS Classic here yesterday.
While Elena Baltacha reached the second round for the first time in four attempts with a straight-sets win over Alyona Bondarenko, compatriot Amanda Janes squandered four match points to lose in a third-set tie-break to Japan's Akiko Morigami - a woman playing on grass for the first time.
Baltacha, the British No 1, overcame early jitters to blitz the Ukrainian 7-6, 6-1 to earn a second-round match with either Lisa Raymond or Milagros Sequera.
It took her almost the entire first set to find range with her booming forehand and first serve, two of the most powerful shots on the women's circuit, but once she did Bondarenko had no answer as the second set was whipped from under her feet.
It looked as though it was going to be a long evening for Baltacha before that, though, as she hit a string of unforced errors to find herself a break down and her opponent only one game away from taking the first set.
"I was so nervous," the 21-year-old said. "It was not easy in those conditions having been hanging around for six hours. But once I got going my nerves settled down and I moved and concentrated a lot better."
Everything conspired to make what should have been a rudimentary first-round match into a much more difficult proposition as Baltacha psyched herself up beforehand to beat an opponent to whom she had lost twice in recent months.
She said: "I demand 100 per cent from myself, I love playing on grass and I have never won here before but I know I have improved a lot. So I wanted to show myself that I could win here.
"And I have played her twice on clay and won just three and four games so I was determined to beat her. I was pumped up for it," Baltacha said in reference to reverses in Rome and the Fed Cup.
Perhaps too much so. She started off tentatively and lost her serve early on before breaking back late in the first set to earn a tie-break. That was a topsy-turvy affair in which she saved two setpoints before prevailing 11-9.
From then on she assumed control and pinned Bondarenko behind the baseline with her massive ground strokes. She broke in the fourth game, held in the fifth and broke once more for 5-1.
Serving for the match, Baltacha set up a second match point with a withering cross-court drive which was converted with a service winner.
It was not a flawless performance but it was one that underlined the progress she had made early in the year when she reached the last 32 of the Australian Open.
Baltacha said: "There are still a lot of unforced errors. I go for it pretty much all of the time so there are going to be but I am working really hard on my patience."
Janes, ranked 227, wasted her scintillating start to turn a potential victory into an excruciating two-hour loss.
She raced into a 3-0 lead, stretching the world No 72 with her sliding left-handed serve and big forehand and took the first set 6-3.
For some reason she failed to turn up in the second set, losing it 6-1, before she rallied in the decider and established four match points - unfortunately all on her opponents' serve.
The first was lost to a high volley at 4-5 but at 5-6 Janes must have thought it wasn't going to be her day when Morigami benefited from a huge net cord that ricocheted the ball at head height.
Two more opportunities went begging and Janes proceeded to lose the first three points of the breaker and the match itself as Morigami converted her first chance.
"I cannot quite believe it," she said. "I am still struggling to come to terms with it. When you have got match point you are almost thinking about the next opponent but you have to finish it off."
Janes has difficulty winning big points, having missed out on a set-point against Kristina Brandi at Surbiton last week as the Puerto Rican prevailed and went on to win the tournament.
She is also at a crossroads in her career. Aged 27, she believes that she needs to make serious inroads into her low ranking over the next two tournaments, Eastbourne next week and Wimbledon, if she is to remain on the tour.
The Cambridge graduate is due to be married next month and joked after yesterday's defeat that the pressure to have a family may prove stronger than the one to win tennis matches.
She said: "My fianc> and I had psychometric tests and one of the questions we had to answer was how many children we wanted.
"I put down three or four but he put down five or more - the maximum he could - whether he has got me on some breeding programme or something I don't know.
"I would like to carry on but I would have to feel that I was capable and able of winning matches like today."
Anne Kremer, the veteran from Luxembourg, earned the
right to take on Maria Sharapova in the second round today. Kremer, aged 29, came from 4-2 down in the first set against Tatiana Perebiynis, of Ukraine, to win 7-5, 6-2 and set up a second-round clash with the defending champion and Wimbledon champion.
Perebiynis, aged 22, looked to be in control of her match against Kremer but lost confidence in her serve after three service game losses in a row. She saved three set points before losing a first set that lasted 42 minutes before offering little resistance in a one-sided second.
Anna-Lena Groenefeld, of Germany, the No 13 seed, became the tournament's first notable casualty when she lost 6-4, 6-3 to Stephanie Foretz, of France.
Virginie Razzano, also of France, defeated Carly Gullickson, of the United States 6-4, 7-6.