SANTA CLARA -- The 49ers will hold their first practice of the week Wednesday afternoon to begin preparations toward facing the New York Giants on Sunday in the NFC Championship Game at Candlestick Park.Here's are some of the elements to keep tabs on throughout the day:--The 49ers are scheduled to hit the practice field at 2 p.m. At that point, we'll have a better idea whether to expect tight end Delanie Walker or receiver Ted Ginn to play in the game.If Walker participates in any portion of practice, it means that he has been cleared and you can expect him to suit up for Sunday's game. Walker sustained a fractured jaw on Christmas Eve. The game Sunday will take place four weeks after the injury.When the 49ers faced the Giants on Nov. 13, Walker was the 49ers' leading receiver with six receptions for 69 yards. Strangely, those were the last passes Walker caught in the regular season. He was held without a catch in his final six games.Ginn twice exited Sunday's game against the New Orleans Saints with a right knee injury. He was seen with a pronounced limp on Monday.--Keep checking those weather reports. The forecast calls for rain to arrive in the Bay Area on Thursday and last through Monday. It's almost impossible to project which team a sloppy field would favor.--The 49ers are certain to be asked about some comments from the Giants, such as safety Antrel Rolle saying, "I might be a little biased, but in our minds, we can't be beat."Many have focused on the last part of that quote -- "we can't be beat." The entire quote sounds reasonable. But a couple 49ers have already responded.Donte Whiter, the hard-hitting 49ers safety, responded via Twitter: "Out here in San Fran we let our Shoulder Pads do all the talking.haha"Tackle Anthony Davis chimed in with a dash of humor: "Are the Giants doing drunk interviews? lol"