Oliver Burke scored his first Bundesliga goal as Leipzig extended their unbeaten start to the season with a 1-1 draw in Cologne.The Scottish midfielder opened his Bundesliga account with a low left-footed shot which took a deflection off Frederik Sorensen on its way past Timo Horn in the fifth minute.Yuya Osako drilled a shot into the top left-hand corner of Peter Gulacsi's goal, beating the Leipzig custodian inside his near post to bring Cologne level after 25 minutes.The hosts had the better of the second half, but they could not find a winner as they missed an opportunity to move second, but remained unbeaten for the season, like their guests.ends