Martinelli and Havertz combine to snatch Arsenal last-gasp victory

Both players have had their frustrations this season, but this flash of brilliance showed why Mikel Arteta sent on his dynamic duo with 20 minutes to go.

GERMAN EFFICIENCY: Kai Havertz, centre, celebrates after scoring Arsenal's winning goal against Sporting on Tuesday night. Pic: Zed Jameson/PA 

Champions League: Sporting 0 Arsenal 1

The match clock had just ticked past the 90-minute mark when substitutes Gabriel Martinelli and Kai Havertz combined in a moment of sheer quality to win Arsenal the hardest of first-leg victories in a tense Champions League quarter-final.