Stjarnan 1-4 Celtic (1-6 agg) | Champions League qualifying second leg

• Stjarnan 1-4 Celtic
• Finsen 7; Biton 33, Mulgrew 49, Griffiths 88, Johansen 90Ronny Deila, the manager, said Celtic will have to improve if they are to continue their Champions League quest after overcoming the part-time Icelandic side Stjarnan, eventually with ease, in their second qualifier.The Scottish champions travelled to the tiny Samsung Vollur stadium with a 2-0 advantage from last week’s first leg in Glasgow but found themselves under some unexpected pressure after only seven m