Oli McBurnie has dropped out of the Scotland squad as Steve Clarke 's striker woes deepen.
The Sheffield United star joins injured Lawrence Shankland in withdrawing from fixtures against Israel and the Czech Republic.
Cardiff's Callum Paterson has been drafted in ahead of Thursday's Euro 2020 play off against the Israelis at Hampden.
McBurnie's absence leaves Clarke short of natural options at the end sharp end of the pitch after it was confirmed on Saturday Shankland's ongoing injury troubles at Dundee United would see him ruled out.
Lyndon Dykes received a first call-up last week but has no international experience.
However, Oliver Burke has played up top for his country in the past.
Paterson, too, has played in advanced areas for Cardiff City, although is predominantly known as a right-back.
McBurnie's unavailability comes after Clarke expressed hope he could become a difference-maker for the national side.
The manager said last week: "He scored loads of goals in the English Championship.
"On the back of that, he got a great move and he had a very good season for Sheffield United in the English Premier League.
"£20m is a lot of money, but in the grand scheme of things of what English clubs were spending at the time, it wasn't a lot.
"It was just a normal transfer from the English Championship to the Premier League, but the boy deserved his move because he scored a load of goals at Swansea.
"International football is another step up, a different step, and it could be that Oli's going to take a little bit of time to adjust and adapt to it. I look at the qualities he's got - good hold-up play, can link play and bring midfield players into it, not the quickest, but he's a good finisher when he gets in the box and he's very good in the air."
Scotland host Israel on September 4, with a place in the play off final at stake, before travelling to take on the Czechs three days later in the Nations League.
