There's still all to play for, insists Weir
Rangers took control of the first leg at Ibrox early in the second half and opened the scoring in the 66th minute when Steven Whittaker rose brilliantly to head home a Vladimir Weiss corner.
Matias Fernandez, however, headed an 89th-minute equaliser to ensure Sporting will reach the last 16 if they keep a clean sheet in the return leg in Portugal next week.
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Hide AdHowever, Weir believes Rangers will create chances in the Portuguese capital, encouraged by the fact that Kyle Lafferty had two decent opportunities after the equaliser but saw goalkeeper Rui Patricio block both times.
The defender said: "There is still all to play for, I don't think there is a great deal between the teams.
"I'm sure they will feel they have the upper hand now but I still think we have every chance in the tie. The fact that we created chances when there was so little time left gives us hope."