Two losing clubs in Group F of the Union of European Football Associations (UEFA) Champions League will try to get their first win in their respective campaigns as Arsenal host Olympiakos at Emirates Stadium today.

Despite losing their season openers, the Gunners and Olympiakos are both riding two-match winning streaks heading to this afternoon's showdown. 

Before facing the club from Greece, Arsenal have defeated Tottenham Hotspur in the Football League Cup and Leicester City in the Premier League. 

Unfortunately, Arsenal was unable to defeat Dinamo Zagreb in their first match in the Champions League. 

The bright spots for the Gunners heading to the match are forwards Theo Walcott and  Alexis Sanchez. 

Sports Mole reported that Walcott have scored in three of Arsenal's last four matches while Sanchez had a hat trick in their recent win over Leicester City. 

Facing Olympiakos at home, Arsenal manager Arsene Wenger said, according to BBC Sport, "You have to win your home games if you want to qualify from the group stage. It's as simple as that."

He added, "We can't afford to drop points against anybody at home. We are in a position where we have to win our games and I am confident we will." 

Meanwhile, Olympiakos will be going to the match bringing back-to-back victories over FC Xanthi and Giannina F.C. in Superleague Greece. 

In their Champions League opener, the Greek club suffered a 3–0 defeat to Bundesliga champions Bayern Munich, which was their only loss this season so far. 

Because of the loss, Olympiakos sit together with today's opponent Arsenal in the bottom of Group F having zero points. 

A win for both clubs will help them in the group stage and their campaign to make it  to the next round of the tournament. 

The Champions League matchup of Arsenal and Olympiakos will be played today, Sept. 29, at 2:45 p.m. EST. To watch via live stream, click here.