What's in store for Round 2?

The opening 18 holes at Augusta National on Thursday showed us many things -- and many numbers (including 7s and 8s.) What did we learn?

For starters, Phil Mickelson was able to convene a search party on the 10th hole and Henrik Stenson saw a stellar round go down the tubes at No. 18. And what about Tiger Woods' even-par 72 in Round 1?

Our experts analyze all that and more in our latest edition of Masters Four-Ball.

1. What does Tiger Woods have to do to get to the first page on the leaderboard after 36 holes?

Farrell Evans, ESPN.com senior golf writer: Tiger has to drive the ball better. Period. That's a start.

Bob Harig, ESPN.com senior golf writer: Get his mental swing demons sorted out. Woods admitted he reverted to old swing thoughts on Thursday. That's a killer. And it has been something we have seen rarely this year. Woods has been hitting the ball well for months. He needs to return to that.

Kevin Maguire, ESPN.com senior golf editor: Straighten out his tee shots. Woods hit only six fairways in Round 1 and still managed to hit 12 greens. But when you're out of position at Augusta, you can put yourself in some precarious places on those greens. If Tiger's going to be near the 36-hole lead on Friday night, he needs to find the short stuff more often.

Gene Wojciechowski, ESPN.com senior national columnist: Remember how to drive the ball. He had a fistfight with his swing Thursday, beginning at the practice range in the morning.

2. After Phil Mickelson's 74, how realistic are his chances of a fourth green jacket?

Farrell Evans: Phil can go out and shoot 60 on Friday. He knows the course that well.

Bob Harig: He's got a lot of ground to make up, but Lefty seemed confident he could do it, pumped by a late push to save his first round. A birdie at the 18th helped, and Mickelson suggested he'll be swinging hard and going after birdies on Friday morning.

Kevin Maguire: Let's say 50-50 at this point. Lefty tried to play it up like he was oh-so-close to being a couple of shots out of the lead with a good round Friday, but we've heard that before. I'm not saying there's zero chance, but it'll be a long, uphill climb if he wants to add another green jacket to his wardrobe.

Gene Wojciechowski: Extremely realistic. To quote Lefty, he's one good round from being in contention.

3. Bigger surprise: 52-year-old Fred Couples (T-10) or 20-year-old Patrick Cantlay (T-15)?

Farrell Evans: I'm not really surprised by either showing. However, I will be very surprised if they can play well enough over the next three days to stay in these positions.

Bob Harig: Cantlay. Couples can get around this place in his sleep, but Cantlay -- although polished and quite capable -- is still playing the Masters for the first time. Nerves can get the best of you in such a situation. He handled it quite nicely.

Kevin Maguire: Gotta go with Cantlay here. At least Couples, being a former Masters champion, has a long track record at Augusta National. Cantlay's a 20-year-old UCLA sophomore who's making the Masters look like his spring break. Granted, he was low amateur at last year's U.S. Open, so it's not a total stunner.

Gene Wojciechowski: Neither. Couples was one of my top-10 picks. And Cantlay is unflappable as an amateur.

4. Wildest thing you saw in Round 1 of the Masters?

Farrell Evans: Henrik Stenson got it to 6 under par and gave most of it back with a snowman at 18. Two eagles. I mean, who shoots 1 under with two eagles?

Bob Harig: More than 100 people looking for Phil's ball on the 10th hole. You'd think someone, anyone, would have seen it or heard it or stepped on it ... anything. Yet nobody could find it, and Phil had to play his provisional, leading to a triple-bogey 7. Mickelson said he believes it was the first time he had ever lost a ball at Augusta National.

Kevin Maguire: Bubba Watson's second shot on No. 11. First of all, he hit it off the pine straw, which is no small feat. Second, thanks to the trees in his way, he had to have the guts to aim his shot out over the pond and play a big old draw for the lefty. And he did exactly that, making it look like he stuck a nice drive down the middle and then a safe approach shot to the green. Neither of which was true, but it was simply amazing what Watson pulled off.

Gene Wojciechowski: An 8 by Henrik Stenson. Without a penalty stroke, lost ball, etc.