[Getty Images]Former Arsenal striker Theo Walcott feels "important" midfielder Thomas Partey could be a "miss" against Paris Saint-Germain.The Gunners will be without the 31-year-old for the first leg of their Champions League semi-final against PSG after he picked up his third booking of the tournament on Wednesday night.Fellow midfielder Declan Rice showed his frustration towards Partey after he picked up the yellow card for getting involved in an incident with Real Madrid defender Antonio Rud