Nicolo Zaniolo returned to action for the first time since January as Roma lost at Napoli on Sunday.
Thiago Alcantara is linked with a move to Liverpool and Jurgen Klopp praised the Bayern Munich midfielder's quality.
Inter boss Antonio Conte could scarcely disguise his anger after his side were beaten by Bologna before Atalanta applied further pressure.
Inter have doubled down on their desire to keep hold of Lautaro Martinez, who continues to be linked with Barcelona.
Bologna scored twice inside the final 16 minutes to seal all three points against Inter, who had taken the lead through Romelu Lukaku.
Frankfurt were stunned by Basel, who thumped them 3-0 away from home. Frei and Bau scored late in the game to give the German side a mountain to climb in the second half.