The 29-year-old Argentine scored a brace against Swansea City at the King Power Stadium.
Wickham sends Palace into just their second ever domestic cup final and first since 1990.
The 24-year-old midfielder is desperate to be selected by England boss Roy Hodgson.
The 66-year-old boss suggested the fixture list was to blame for the Gunners fading in the second half.
The Mackems moved out of the relegation zone with a goalless draw against the Gunners.
Mamadou Sakho could be unavailable for over a year should he be found guilty.
Sunderland host Arsenal in the Premier League on 24 April. Find out where to watch live in the UK.
Theo Walcott's last start in the Premier League was against Manchester United on 28 February.
Arsenal suffered back-to-back defeats at the hands of Manchester United and Swansea City in the Premier League.
Crystal Palace face Watford in the FA Cup semi-final clash on Sunday. Find out how to follow the match in the UK.
Van Gaal believes Taylor "changed" the tie despite agreeing with second half penalty decision.
Martinez remains committed to delivering silverware after second semi-final defeat of the season.
Martial nets in the final minute of added-on time to stun the Toffees at Wembley.
The 35-year-old midfielder thinks this season has been a 'freak' and will not be repeated.
N'Golo Kante is a rumoured target for both Arsenal and Tottenham Hotspur.
Alexis Sanchez and Mesut Ozil have two years left on their Arsenal contract.
Anthony Martial's late goal seals United's place in the FA Cup final next month.
The 26-year-old player has made 22 Premier League appearances this season.
Mesut Ozil has not made it into the PFA Team of the Year.
The Magpies came from two goals behind to earn a draw at Anfield.
Manchester United face Everton in the semi-finals of the FA Cup as they battle City and Arsenal for a place in the top four.
Luis Suarez was a target for Arsenal in the 2013 summer transfer window but they failed to convince Liverpool to sell.
Arsenal are battling Manchester City and United for a place in the top four of the Premier League.
Manchester City host Stoke City in the Premier League. Find out where to watch the game live in the UK.
Emre Can was initially expected to miss rest of the campaign after picking up an ankle injury during Liverpool's win over Dortmund.
Arsenal face a battle to finish in the top four with Manchester United and West Ham closing in.
Everton face Manchester United on Saturday. Find out how to follow the match in the UK.
Liverpool face Newcastle United in the Premier League clash on Saturday.
The 26-year-old forward is eager to progress at Anfield, after notching his 50th goal for the club.
The former Reds boss is returning to his former stomping ground with his relegation-threatened team.