Australian Open Day 7 Predictions

From here on in the tournament, since the number of matches per day is way more manageable, I'll be doing predictions as to all the singles winners:

Men's Fourth Round:

Andy Murray (GBR)[5] v. John Isner (USA)[33] -- This one should be the match of the day.  Isner is 9-0 on the year, and Murray has been absolutely cruising through his (fairly weak) draw thus far.  If Isner can jump out in front with first strikes, the way Cilic did at the US Open vs. Murray, he'll win this match.  Prediction: Isner in 4.

Ivo Karlovic (CRO) v. Rafael Nadal (ESP)[2] -- Nadal really did not look sharp in his third round match against Kohlschreiber, and this will be a tough match for him to regain any rhythm in.  I think Nadal will take this one in two tight sets and a lopsided third.  Prediction: Nadal in 3.

Andy Roddick (USA)[7] v. Fernando Gonzalez (CHI)[11] -- This is the closest match in terms of seeds, but I think Roddick will get through fairly easily.  The last time Roddick met Gonzalez in a slam, at the 2008 US Open, he crushed him.  This will be a big chance for Roddick to send a message to the rest of the field.  Prediction: Roddick in 3.

Marin Cilic (CRO)[14] v. Juan Martin Del Potro (ARG)[4] -- Of the top four seeds, Juan Martin del Potro has looked by far the weakest in the first week of this event.  Cilic is a dangerous player who is playing well, and the match is surprisingly his to lose in my mind.  I like his chances here a lot.  Prediction: Cilic in 4.

Women's Singles Fourth Round:

Alona Bondarenko (UKR)[31] v. Jie Zheng (CHN) -- Not a match many expected to see.  The elder Bondarenko has had a phenomenal 2010 so far, so I'll take her to knock out the always tricky Zheng on account of her superior steadiness, if nothing else. Prediction: Bondarenko in 3.

Nadia Petrova (RUS)[19] v. Svetlana Kuznetsova (RUS)[3] -- As much as Clijsters' ousting was a result of an epic collapse like nothing I had ever seen before, it was also because Nadia Petrova played some really phenomenal tennis.  Kuznetsova, who got taken to 6-4 in the third against a qualifier in the last round, hasn't been nearly so phenomenal.  So I'll take the taller one here.  Prediction: Petrova in 3.

Justine Henin (BEL) v. Yanina Wickmayer (BEL) -- Henin really did not look sharp against Kleybanova at all, but Wickmayer's way of spraying the ball all over the place isn't enough to beat a player of Henin's caliber on this stage.  Prediction: Henin in 2.

Maria Kirilenko (RUS) v. Dinara Safina (RUS)[2] -- This is a tricky one.  Safina has been playing better than she has since the French Open (not saying much), but Kirilenko is playing the best tennis of her career.  Probably going with heart over head here, but who cares? Prediction: Kirilenko in 3.