Aleksandar Mitrovic scored form the spot in Newcastle United's 3-3 draw with Manchester United.
Grujic watched on from the stands as Liverpool drew 3-3 with Arsenal in the Premier League.
Forster returned from a 10-month lay-off in a 2-0 win over Watford.
Celtic have been linked with a number of players this month.
Influential midfielder Barry Bannan has signed a new deal at Sheffield Wednesday.
The youngster is set to stay at St Andrew's until 2019.
The 17-year-old will not feature for Leeds United against Manchester City in the academy competition.
Jack Hunt left Crystal Palace to sign permanently for Sheffield Wednesday.
The Tunisian has not played a single game for the club.
Christian Eriksen has scored just four goals for Tottenham Hotspur so far this season.
Tony Cascarino thinks Aiden McGeady would benefit from signing for Nottingham Forest.
Saudi Arabia’s potential initial public offering of its state oil company could be the largest ever, a juicy target for any ambitious Wall Street bank. In a country traditionally cold to outsiders, only a few have the experience to win it.
ICBC Standard Bank is buying the lease on Deutsche Bank's London gold and silver vault, enlarging its footprint in the city's bullion market, four industry sources close to the companies said on Friday.