CHARLOTTE, N.C. -- Observations from the Carolina Panthers' practice on Tuesday:

Increased work: Wide receiver Devin Funchess (hamstring) and defensive end Charles Johnson (calf) took part in a few individual drills before working with the trainers. Both moved well and appear close to returning to full work. Funchess lined up with the second group of receivers during drills. Johnson worked on pass-rushing drills on the side. Coach Ron Rivera hasn’t ruled either out for Friday night’s preseason game against the New England Patriots. ... Backup left tackle Nate Chandler (knee) worked on the side.

Low-key: The Panthers spent a lot of time working the first team against the third team, installing plays on offense and defense. Rivera said none of this was installation for the September 13 opener at Jacksonville.

Good Cam: Quarterback Cam Newton was sharp. At one point he completed four straight passes to different receivers. Veteran receiver Jerricho Cotchery made Newton look good to start that string, making a one-handed snag on a crossing route.

Center of attention: Brian Folkerts took most of the first-team reps at center with Ryan Kalil (sprained knee) out the rest of the preseason. Right tackle Mike Remmers also got some work at center, but Folkerts appears on track to start against New England. The next two weeks are important for Folkerts to prove his value to the team.

Versatility: The Panthers continue to work with Remmers and backup right tackle Daryl Williams at several positions. Remmers is learning to play left tackle and center in addition to right tackle. Williams as worked at right and left tackle. Rivera likes the flexibility that gives Carolina. It also will make decisions on cut day easier if the staff is confident players can handle two or more positions.