Author's note: This is a multi-chapter story, currently planned at 5 chapters, about a spoiled brat tennis star's training under a controlling new coach. The story will continue to have a lot of non-consent/reluctance, light bondage/domination, adultery, spanking/humiliation, lesbianism, and other kinks as her "training" progresses. Hope you enjoy!
***
"Mariana."
"Excuse me?" Sasha looked at me, both annoyed and slightly confused.
"Her name is Mariana," I said, nodding at the chef, who was hurriedly making Sasha's smoothie. Sasha had strolled into the kitchen and demanded her morning beverage brusquely yet again.
Today's outfit was more modest at first glance. A pink sports bra was on top, but her matching short, flouncy tennis skirt had a low waist and hung on her hip bones. While it covered more than her stretch shorts, it only made me twice as interested in seeing what was hidden beneath. Her hair was in a thick braid again, swinging gently as she moved.
"I-I know that," she replied unconvincingly, her eyes narrowing. "She's worked for us for years, of course."
"Good, well it's polite to address a person by their name, Alexandra. And say please and thank you," I countered as Sasha glowered at me.
"I do that!" she snapped back at me. Her face reddened when I looked at her doubtfully.
She snatched the smoothie and spun quickly to leave, causing her skirt to twirl, but caught herself at the door.
"Thank you, Mariana," she said with cloying sweetness, then stuck her tongue out at me and stormed off.
-----
"Serves," I said as Sasha wiped sweat from her brow after our warm-up. She'd been better behaved, but had tried again to outhit me at the end of every rally.
"I know, I know," she said, annoyance plain on her face. "Practice for consistency, increase my first serve percentage, yada yada. Anything original or helpful for me, Greg? I'm not paying you just to indulge your sick perversions and humiliate me, remember?"
It was the first reference to last night and she looked at me coldly afterwards.
"No, Alexandra, I'm not saying any of that," I answered, which earned a look of skepticism from her. "Look at these analytics charts. Your first serve effectiveness is top quartile."
I'd hired a firm to crunch all her matches and index her against the rest of the tour. Such advanced statistics work was now almost standard, having percolated from other big sports in the last five years, and guided most players in their strategy and practice. It was new to Sasha, however, and she took the packet from my hand and started flipping through the various charts with interest.
"Your first serve rate is terrible, bottom quartile, but your rate of acing opponents is top ten on the tour. It balances out to be a terrific first serve, and I don't want you to change a thing as its a strength. Sure, you can land a few more, but aces are the best shot in the game and you do fine overall."
"So what then? Second serve?" she asked, flipping to another page. "All the other coaches lectured me endlessly on that and my double fault rate is average now, see! I've improved it a lot these past two years."
When she first entered the tour, she'd had a booming first serve and terrible second. She led the tour in double fault rate her first year by a margin.
"Oh, you fixed your double fault rate, but you ruined your serve," I said, pointing at another diagram. "Now it's weak, predictable, and your opponents tee off. You have one of the worst second serves on tour in terms of points won. You might as well give two first serves at your effectiveness rate."
She set her jaw and I saw her fingers threaten to crinkle the paper as she fought back anger. Criticism was still difficult for her to accept.
"First they tell me to make it safe, get it in, force my OPPONENT to make a mistake," she said, scowling. She tossed the packet to the bench with disdain. "Now you say to hit it harder and make my serve riskier! Who should I believe? You all are full of RUBBISH!"
"I'm having you play to your strengths," I said, reaching out to rub her shoulder. She pulled away and looked unhappy. "Serving is your advantage. Every serve you make should be feared, even if it means you double fault at a higher rate than average. I'm serious about serving two firsts at times, especially if you are serving well during a match."
She looked at Yelena, who'd be listening silently.
"Sashka, he is right," she said firmly. "You shouldn't back off on your serves, it's not you."
We spent the next couple hours working on her second serve, not for consistency and safety, but to make it more aggressive. I'd had one of the better second serves on tour when I played, even more important for me because my first serve was pedestrian at best, and had a wealth of knowledge on how to disguise spin, pace, and location in ways that kept an opponent on their heels.
She struggled at first, as she'd been practicing a soft and consistent second that had little variety, but towards the end she was having fun trying to make it kick or snap with no regard for whether it was in the box or not. I planned on working on her second serve the most these next couple of weeks as it would yield immediate points. Her other play faults, including her attitude, were a longer-term project.
Standing behind her afforded me a wonderful view with every serve attempt. Her skirt flew up as her body snapped forward, flashing her bottom at me for a delightful second. Instead of stretch shorts, she wore a pair of what looked like normal pink knickers underneath, although maybe made from a synthetic fabric as a concession to performance. They were cut small, and exposed a nice slice of her pale ass cheeks. As if to further tease me, she tucked her spare ball under her knickers, pulling up her skirt and sliding a ball under the hem to be trapped against her bare ass cheek.
"Do you like my knickers?" Sasha asked as we wound down the practice. She had caught my gaze lingering one too many times. She lifted her skirt and did a little spin so I could see the pink underwear better. "Aren't you sick of the compression shorts that have taken over? You seem like the sort that misses the days when the women wore proper knickers on the court."
"I've no complaints, and remember Gabriela Sabatini fondly," I answered. Sabatini was infamous for her colorful choice of underskirt attire.
"I'm thinking of bringing the look back," said Sasha with a grin. It would certainly get her millions more views on the internet, I acknowledged, as if she didn't receive more than her fair share already. "Of course, I'm sure you have an opinion on that."
"Only a favorable one. Seeing your knickers does make me realize that you've earned no spanks yet today," I said, her ass clearly on my mind. I felt a healthy twinge of regret. "You've been a model student this morning, Alexandra, I must admit."