Jose Mourinho admits Tottenham Hotspur have no replacement for Harry Kane.
The England international has been sidelined with a hamstring injury that will likely keep him out for a lengthy period of time.
Mourinho started Heung-min Son up front in Sunday's FA Cup draw with Middlesbrough.
He told reporters after the game: "We have what we have and we stick with them. The boys did what they can.
"You cannot transform Lucas or Son in a number nine like Harry Kane.
"We changed things and took our risks. Our team in the last 30 minutes we didn't even have a midfield playe.
"We played with six attacking players without a striker. We took our risks."