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Keita Balde came close to adding a second for his side, but saw his close-range effort blocked by Christian Puggioni.
After the break, Keita Balde tried his luck with a near-post flick, which Puggioni turned round the post.
In the 70th minute Lazio made their domination count by scoring their second of the afternoon. Keita Balde cut in from the right and drilled in a low strike, which took a deflection and found its way into the bottom corner.
Miroslav Klose almost scored a third goal a minute later, but he could only find the side-netting from a tight angle.