Manchester United are missing a striker like Robert Lewandowski, according to Rene Meulensteen.
Ole Gunnar Solskjaer took the bold decision to stick with Anthony Martial and Marcus Rashford as his two main forwards after Romelu Lukaku was sold to Inter last summer.
The pair have evenly shared 38 goals between them this season, helping United challenge for a top-four finish as well as the FA Cup and Europa League.
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Mason Greenwood has also been impressive in a back-up role, and Odion Ighalo's arrival at Old Trafford on loan from Shanghai Shenhua in January added extra depth to United's attack.