Allardyce wrote in the London Evening Standard: "Modibo has been steadily improving in recent games. He has been making chances, which is always a key performance indicator as they say in the business world.
"I don't think he lost a ball in the air when he came on and it was a great leap for his goal. In addition, he could have hardly struck the ball better when he hit the woodwork late on.
"Modibo is a quiet, unassuming person and it has been difficult for him since he came to us 18 months ago. He started the season in the team because Andy Carroll was unfit and it was his big opportunity to contribute."