Borussia Dortmund striker Robert Lewandowski is doubtful for the Bundesliga game against Freiburg on Sunday.
Scotland forward Ross McCormack knows their 1-0 victory over an under-strength Poland will count for little when they return to Warsaw in competitive action.
Scott Brown scored his second Scotland winner in two games as Gordon Strachan's side beat Poland 1-0 in a Warsaw friendly.
Borussia Dortmund striker Robert Lewandowski has been ruled out of Poland's squad for the friendly against Scotland.
Poland striker Robert Lewandowski will miss Wednesday's friendly against Scotland due to a knee injury.
Lightning struck twice for Marc-Andre ter Stegen on Saturday when Borussia Moenchengladbach faced Eintracht Braunschweig.
When Dortmund became the fifth different team to win the Bundesliga in eight seasons in 2011, the league was wide open.
Borussia Dortmund coach Jurgen Klopp claimed his team were close to their best after they beat Zenit St Petersburg 4-2.
Borussia Dortmund got back on track with a 4-2 victory away to Zenit St Petersburg in the Champions League.
Marco Reus and Robert Lewandowski combined to put Borussia Dortmund on the brink of the Champions League quarter-finals with a 4-2 win over Zenit St Petersburg
Zenit St Petersburg 2 Borussia Dortmund 4 - Champions League round of 16 first leg result.
Borussia Dortmund struck twice in the first five minutes and Robert Lewandowski grabbed a second-half double as last season's Champions League runners-up won 4
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