Joe Hart admitted he was "moping around" after missing out on England's World Cup squad but is now "filled with desire to get back to the top".
The 31-year-old goalkeeper has earned 75 caps for his country and played every minute of England's qualifying campaign, only to lose his place on the eve of the tournament.
Hart is due to return to parent club Manchester City in pre-season after disappointing loan spells at Torino and West Ham and is determined to re-establish himself as one of the best 'keepers in England.
"First off, this is an apology to anyone who's been hanging around me in the last couple of weeks," he said in an Instagram video.
"Obviously I've been moping around but those days are over."
"I'm ready to support my team, I'm ready to come back stronger, I'm filled with motivation, I'm filled with desire to get back to the top."
"Let's talk about the other night... Harry you hero."
"It's horrible being a supporter and I don't want to get used to it but that elation I felt when he scored, you guys must have all felt it."
"That's awesome."
"I'm going to have my number five John Stones shirt on for the rest of the tournament."
"He'll be balling and I'm gonna be cheering."
Source: Skysports