FOXBOROUGH, Mass. – Brad Friedel has often said that the primary objective of preseason is to emerge unscathed and fully healthy, but unfortunately the New England Revolution do have a few injury concerns ahead of Saturday afternoon’s season opener against FC Dallas (4:30 p.m.ET, NBC Sports Boston, 98.5 The Sports Hub).

Isaac Angking, who missed the preseason finale against KR Reykjavik this past weekend with a quad injury, returned to full training on Tuesday morning and should be available for the trip to Texas when the Revs depart on Wednesday afternoon.

Juan Fernando Caicedo and Andrew Farrell, however, are question marks ahead of the weekend.

Caicedo missed the final three preseason matches with a minor muscular injury, but Friedel said he’s on the verge of a return and could recover in time for Saturday’s opener.

“He’s day-to-day,” Friedel said of the Colombian forward. “Hopefully, he can be with us this weekend. We’re expecting big things from him this season.”

Friedel called Farrell’s situation “a little bit more delicate,” as the veteran right back suffered a face/eye injury in what Friedel termed “a freak accident” on the training ground. The injury prevented Farrell from traveling to Florida for the second leg of preseason, and it’s unclear when he’ll be back on the field.

Farrell did join his teammates inside the Empower Field House on Tuesday morning, and although he wasn’t able to train, the 26-year-old was in good spirits.

“I wish I could talk in more detail about it, but I actually don’t know much about the eye,” said Friedel. “What I do know about it is that it’s not serious as long as you take care of it in the way that you should. As long as he stays out the allotted time needed, he’ll be back fully fit with no future problems.

“It was quite serious, as it turned out. Hopefully, he’s back with us very, very soon.”