The Champions League last-16 return-leg between Manchester United and Olympiacos is being eagerly anticipated all around the world.The Greek champions stand an excellend chance of going through after their 2-0 first-leg win and a player who helped them along their way sent them a message of support shortly before kick-off.Vladimir Weiss spent six years at Man City and, after several loan spells including Bolton Wanderers and Rangers, ended up at Olympiacos in the summer of 2013.Via his personal Twitter account, the Slovakian international stated: “All eyes on Olympiakos… good luck boys!”The 24-year old played an important part in the Greeks’ qualification past the group stage, while also contributing with a wonder goal against Paris Saint-Germain.However, a 3.2million pound offer arrived in January from Qatari football club Lekhwiya SC which Olympiacos could not turn down. In his brief career so for the Qatari side, Weiss has managed two goals in four matches.