LAKE FOREST, Ill. -- A day after expressing frustration with his recovery from offseason arthroscopic hip surgery, Chicago Bears receiver Brandon Marshall missed practice Wednesday to attend a planned follow-up appointment on his hip, a source told ESPN.com's Michael C. Wright.
The appointment was scheduled immediately after the surgery was performed, the source said.
Bears coach Marc Trestman said Marshall won't be at the preseason finale against the Cleveland Browns on Thursday and will return to the team Sunday and practice Monday.
"This was a planned-out miss today for personal reasons," Trestman said. "It's something that was part of the offseason plan since we started training camp."
Marshall said he is fine -- and later tweeted that he will play against the Cincinnati Bengals in Week 1.
— Machine Marshall (@BMarshall) August 28, 2013
Marshall told ESPN.com he is just frustrated with his recovery.
"As far as me not being out there today, this is something we've had planned since camp [opened]," Marshall told Wright. "I had some things I needed to do, and I sat down with Coach Trestman and we decided [Wednesday] would be the best time to do it.
"It's nothing serious, but I'll just keep my personal business to myself."
A source close to the situation told ESPN NFL Insider Adam Schefter that Marshall is upset that the Bears have not taken his hip concerns seriously.
But Marshall told Wright on Wednesday that he is purely focused on recovering.
"Other than the hip, I'm feeling great and life is good," Marshall said. "And my hip's gonna be great, too. But it's all about this recovery, which has been a little frustrating."
Trestman declined to elaborate whether Marshall's excused absence was connected to the wide receiver's surgically repaired hip.
"I'd rather just leave it to personal reasons out of respect to Brandon, but it's all good," Trestman said. "As I've said when I let guys go for personal reasons, it's all good, and this is all good. It's not reflected in anything other than I gave him time off."
Kennard McGuire, Marshall's agent, discussed his client's situation.
"Brandon is accustomed to executing and playing at a high level, and being the perfectionist that he is, his expectations of himself are very high," McGuire said. "Anything less than elite is unacceptable to him. As far as him not being there, this has been planned with the Bears and Brandon long before yesterday. Any other suggestion, thought or implication are all unfair to Brandon and the Bears organization."
On Tuesday, Marshall indicated the Bears might be pushing a little harder than he'd like as Chicago attempts to prep its star wideout for the regular-season opener on Sept. 8.
"It's one of those things where you may be rushed a little bit, and some people might think I need to be farther on than where I am," Marshall said. "So it's a little frustrating not being where I want to be right now, and maybe pushed a little bit. So we'll see."
Trestman would not address Marshall's initial comments.
"He had a very good practice on Tuesday," Trestman said. "He ran well, he ran his routes, he took his reps. ... He finished. I can't speak for his comments, but what I saw on the field was a guy getting ready to play."
Marshall sat out almost the entire offseason program because of the problematic hip but was cleared to practice when the Bears reported to training camp July 24. Trestman reported no issues with Marshall's on-field performance over the summer.
Marshall, who had a third career hip procedure in January, established Bears records for receptions (118) and receiving yards (1,508) in 2012, his first season in Chicago. Marshall also caught eight touchdown passes, tied for sixth on the Bears' single-season list.
"I'm just trying to get healthy for Week 1," Marshall said Tuesday. "So you've got to have a game plan coming off surgery, a third hip surgery. So yeah, I'm not where I want to be right now. For myself, mentally [and] physically, we need to pick it up a little more."
Bears tight end Martellus Bennett, one of Marshall's close friends, said there is no reason to panic about Marshall's status.
"When you have the heart of a champion, you want to be at your best every single time," Bennett said. "I think he's frustrated now with his body more than anything else. When you have to come back from an injury, you just need to keep working. So he'll just keep working. I'm not really worried about him. He's a great player. I've always looked up to him. He's still the leader of our group in more ways than one. I'm just excited to get the regular season going with him out there."
ESPN.com's Michael C. Wright, ESPNChicago.com's Jeff Dickerson and ESPN NFL Insider Adam Schefter contributed to this report.