After joining Sunderland and turning out for them at the start of the season, Guiu's loan was cut short by Chelsea after a serious injury suffered by fellow striker Liam Delap.
With FIFA rules stating players can only turn out for two clubs in the one season, should Guiu leave Chelsea in January, his one option would be a return to Sunderland.
Asked about the prospect, Le Bris said: “Yeah, but too early to say. The problem with him is he played for Sunderland and played for Chelsea. So, if he has to go on loan, it’s only for Sunderland.
“So, it might be the only choice, but it’s up to us to decide. And at the minute we have good strikers and we don’t need anything at the minute.”
He also stated: "I really liked the relationship with him. You can feel that he’s really coachable.
“He wants to learn, he wants to develop himself and he wants to connect with people. So, I really appreciated this part of his personality.
“But his fitness level wasn’t good at that moment. So, the main part was to give him the opportunity to train with the squad, work in the gym.
“And we worked for Chelsea because I believe that now he’s ready. But it wasn’t the case with us.
“He’s a really good footballer, really committed, complete forward, who can run in behind, hold the ball, defend really well and counter-press really strong. A good forward.”