Los Angeles Clippers star small forward Paul George suffered a strained left hamstring against the Boston Celtics on Friday and head coach Doc Rivers admits he's worried.

George will clearly use the All-Star break to recover, but nevertheless, Rivers is concerned since this is the second time this season George has hurt his hamstring:

“Yeah I am,” Rivers said when asked if he was worried about George's injury, via ESPN. “I'm a little concerned about that one because that's the second time now, maybe third. Listen, I don't know what to do, but I know rest you have to do and we'll see.”

The Clippers are 37-18 on the season. They are in third place in the Western Conference standings.

George played in 34 games for the Clippers in the first half of the season. He averaged 21.7 points, 6.1 rebounds and 3.9 assists while shooting 42.6 percent from the field, 39.4 percent from beyond the arc and 89.9 percent from the free-throw line.

The Clippers need George to be healthy for the playoffs if they want to accomplish their goal of winning their first-ever championship this season. The same goes for two-time Finals MVP Kawhi Leonard, who unfortunately won't get any rest this weekend since he's playing in Sunday's All-Star game.

George, 29, has career averages of 19.9 points, 6.4 rebounds and 3.3 assists.