No more Oreos or Jamba Juice? Venus is aspiring to have a better diet in 2012. (AFP/Getty)

A tall order for the taller sister. Can the meat-and-potatoes Wimbledon-queen summon her past success as a leaner and greener player?

Older sister Venus, who’s claimed five titles at the All England Club, is having a health scare of her own after being diagnosed with Sjogren’s Syndrome, an autoimmune disease, which can lead to damage of the body’s vital organs. The illness forced her drop out of the US Open this year and has pushed meat out of her diet.

Despite the seriousness of the condition, Venus has been sporting a positive attitude and even healthier eating habits. She told reporters, “I changed my diet completely, so lots of vegetables. I [altered] my mind frame completely because I was the person who always ate their steak first and their salad second.”

Times are changing for the superstar, who said last year that she “eats to live and not lives to eat.” She continued talking foodie favorites, saying that she considered “beans and rice and blackened chicken” a top meal choice.

Venus discussed her new diet’s impact on the future. “My goal next year is to play a full schedule. It will take some work to get there, but I’m no stranger to hard work.”

TSF Vault: Venus Williams

This recalls the gourmet changes for 2011 ATP success stories Novak Djokovic, who’s claimed three major titles this year, and Andy Murray, who went on a 17-match winning spree after the US Open.

Djokovic’s decision to cut the carbohydrates to curb his Ciliac disease helped him achieve his best season ever, including the No. 1 ranking. Meanwhile, Murray discussed his own gourmet foray into becoming more fit. Before losing to Tomas Berdych in the Paris Masters, he said, “I think there’s a bit of difference in my approach to training and the diet; I feel pretty fresh.”

Not all’s well for the scrawny-looking Scot, who misses being able to pick up a menu and order what he wants. You can almost imagine his mouth watering when he said: “It can be quite frustrating when everyone else is dunking their bread in olive oil or smearing it in butter.”

Murray aside, Venus’ newfound form and fitness will no doubt have fans worldwide salivating for a dominating force in an otherwise floundering WTA. Petra Kvitova, 21, the current world No. 2 and winner of Wimbledon and the Season Ending Championships, might be the answer. She’s still, however, young and half-baked in terms of talent and poise.

It’s time for Venus to turn up the burners and bring back the motivation for which she’s known. Currently ranked No. 103, having only played a handful of tournaments this year, Venus quickly doused rumors of retirement.

“I love the game. The racket feels right in my hand and I’m planning on going right back to where I was at the top of the rankings in the singles and doubles.”

With Venus back in-shape and on form, the alarm bells should be sounding for the rest of the women’s tour. It’ll be tough to get out of the fire and back into the figurative frying pan that is professional tennis at her ripe age of 31. But if anyone can come back from adversity and succeed, it’s a Williams.

High stakes (steaks?), indeed.