Bengals 23, Giants 10: Tom Coughlin -- "we have a lot of work to do"

WATCH: Coach Coughlin's postgame reaction following Friday's loss #NYGvsCIN http://t.co/4jrU0ytTgF

— New York Giants (@Giants) August 15, 2015

New York Giants head coach Tom Coughlin wasn't thrilled with his team's performance in a 23-10 preseason-opening loss to the Cincinnati Bengals on Friday night.

"I just think our tempo and our rhythm has got to be upgraded. Obviously, we had some issues with protection or running the ball," Coughlin said. "We have a lot of information to sort through on tape tomorrow. We'll just see where we stand."

"We have a lot of work to do. Long way to go. We didn't play the way I envisioned we would play. That's a good football team."

Coughlin added that "things have been put into perspective for us."

Here is more of what Coughlin had to say.

Injury updates

The Giants lost four players -- Mykkele Thompson (Achilles), Landon Collins (knee), Trumaine McBride (hamstring) and Jayron Hosley (neck, possible concussion). The biggest concern appeared to be for Thompson, the rookie safety selected in the fifth round.

Coughlin said the Giants will know something about Thompson's Achilles injury "later," but that there was "big concern" that he had torn it. Trumaine McBride had been "nursing" a hamstring before leaving the game on Friday. Coughlin didn't know the extent of Collns' injury.

Offensive line play

The offensive line was a major concern entering training camp, and it remains that way after Friday night. Coughlin was asked if he was more concerned about that group after watching the game.

"I don't know that I am any more than I was when I came in. This is the third day of work, so I've had a chance to look at that. I'll look at the tape, and then make some decisions or focus a little more on that. No more than it was coming in, no," Coughlin said. "We have some work to do. It's not just the right side, it's the whole offensive line. We've got work to do."

We will have much more news, reaction and analysis from Friday night's loss, so make sure you stay with us for all of your Giants-Bengals coverage.

Ereck Flowers' performance

We know the offensive line struggled as a whole. What, though, did the coach think of his rookie left tackle specifically?

"I'll have to look at the tape. I'm sure there's some things that he's definitely going to be able to improve on. But we got him out there and got him a number of snaps in the game for him. That's good experience for him," Coughlin said. "He'll play probably a little more than some of the others in the preseason, because that's what he needs."