The Sgorio programme will also bring highlights of the two leg matches in a special hour long programme on S4C at 11.00pm on the evening of the match.
The teams will meet for the first time on Wednesday 17 July, as The New Saints host the Polish side for the first leg at Wrexham's Racecourse ground. Watch it live on s4c.co.uk from 7.00pm, with kick off at 7.15pm. The live streaming of the first leg is available to watch anywhere in the world, excluding Poland.
A week later, on Wednesday 24 July, it will be Legia Warsaw's turn to return the favour, as they host the second leg match at the Pepsi Arena Stadium. Watch it live on the S4C website – s4c.co.uk – from 7.40pm. The live streaming for the second leg is available in the UK only.
Catch highlights of both legs in Sgorio on S4C at 11.00pm later on the day evening as the games.
This is The Saints' 15th European campaign, a record for a Welsh club. With several international players in the Legia squad it will be a tough match for the Welsh champions. But with just two defeats in their last six European home ties, the team from Oswestry will be hoping to pull off another shock and fly the flag for Wales once again.