Beşiktaş fell far behind Shakhtar in terms of physical quality. Beşiktaş didn't just lose the first leg. Abraham was also injured and forced to leave the field. From what I understand, Abraham could be sidelined for at least two or three weeks, perhaps even longer.
Beşiktaş opened the season on June 28th despite knowing they would be playing in the knockout stages. Shakhtar opened the season on June 20th. There's only an eight-day difference between them.
Beşiktaş needs to make urgent transfers. They need right and left backs.
I saw Orkun was significantly absent. Jurasek was quite poor. Beşiktaş could improve in the coming weeks.