What do you believe in? Youth or experience? Ranking or form? Keep these questions in mind during Tuesday's three must-see matches.

In a competition where players are known by nicknames, Monfils will, of course, be called "La Monf", the classy French nickname given to him by pals since his youth.

Both seeking better form this spring, the two former Top 10 players met for the first time in nine years at an ATP Challenger in France.

While neither may be at his peak right now, here’s to the old pals bringing out the best in each other.

"Physically, it was not easy for me," said Svitolina, a two-time Grand Slam semifinalist from Ukraine. "It showed, I think, that I'm not at my best, but I'm getting there."

Arizona Tennis Classic founder Jonathan Levine talks wild card waiting game, debuting at the 175 level and happy medium of the tennis calendar.

Riverside County's Department of Disease later identified the culprit to be a bad case of norovirus, as the 2012 edition of the tournament went down in history for all the wrong reasons.

“I felt hurt and powerless because I couldn't stop this terrible war. However, I made a decision to take action,” she said, as the funds are already being used to keep Ukrainian hospitals running.

Some on this list are Grand Slam finalists and all are current or former Top 10 players.

The tennis power couple announced the arrival their first child while Medvedev’s wife Daria also gave birth to a daughter within 24 hours.