The Nigerian arrived on deadline day from Shanghai Shenhua on loan until the end of the season.
And while Berbatov admits he was surprised by the move he thinks Ighalo’s goalscoring record in the Premier League – 16 goals in 55 Premier League games – will help United in their push for the top four.
“Manchester United needed to sign a striker but I was still surprised when they brought in Odion Ighalo on loan,” he told Betfair.
“I think it’s a good move for United because Ighalo has played in the Premier League, and did well with Watford, so he will know what to expect.
“He’s scored plenty of goals in China and his record for Nigeria is impressive too. I want to see him play as soon as possible because I’m curious to see how he will fit in to Ole Gunnar Solskjaer’s plans.
“Marcus Rashford and Anthony Martial both like to cut in from the left so United have arguably lacked a natural number nine this season. That’s what Ighalo should give them and I will be interested to see how they play with him in the side.”
Ighalo joined up with his new team-mates for a training camp in Spain and could be in line to make his Man Utd debut against Chelsea on February 17.